Casting block question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Kw69 · 08-22-2016, 01:39 PM

Hey guys, hope everybody's builds and projects are going good. I may have asked this before but the original engine that came with my truck has a cast number of 3956618. I heard that this block was only used for a few months and for just the 1969 series. I was also told it shared the 350, 327 and 302 internals depending on what vehicle it was going in including the famed camaro z28. The engine was pulled out and a new drop in was installed by the previous owner who has passed away. When I bought the truck, he said that was the origainl engine but had been rebuilt somewhere years ago from the original owner. Unfortunately I can't see the vin cause the deck has been blocked. I did find that this engine was made in 69 cause of the codes. I have a few questions though: is there any other location of a vin number? And is this a rare block cause of the casting number? A friend who has raced cars said that it was a rare block and it was a desirable one along with the high nickel content. Just figured I would ask. The engine right now is sitting in my shop. It's complete and I plan to open it up in the fall. My desire is to put it back in the truck after a rebuild if it needs it. The previous owner removed it because he said it smoked a little bit had no loss of power. So it may be something simple like valve guides, or seals... Who knows. Anyway thanks for all input.
Kris

jr1000yarder · 08-22-2016, 02:01 PM

as far as I know you need the deck # to get you close......

I'm sure others with more knowledge will chime in

**RenoKeene** · 08-22-2016, 04:49 PM

If it has the original intake post the casting #, also pull the valve covers and post the head casting #s then we can get pretty close.

Kw69 · 08-22-2016, 06:58 PM

Ok got the info:
Block 3956618 GM5 A239
Intake 3927184 GM5 A269
Heads:
3932454 A319 GM17
3932454 H189 GM24

Hope this helps
Thanks,
Kris

Kw69 · 08-22-2016, 07:03 PM

All those come up as 1969 parts as far as I can tell by research. Now the head with the H puts in later in August.

**RenoKeene** · 08-25-2016, 02:19 PM

Block is a 350 as you know but the heads are 307. The intake decodes as a 69 350 that came on a car not a truck. Are you sure that is the original engine that came in your truck?
What part of Florida are you in?

Kw69 · 08-25-2016, 08:42 PM

The previous owner who swapped it out said that it was. It was rebuilt and painted blue some years back. But if u scrape off the blue there's orange undernieth. Sad to say he passed away last Dec. I spoke with him just prior and he was very certain that it was the original engine. i live in Ocala btw, my plan was to rebuild the oringal engine and put it back in. So quick question? How can they be 307 heads? Were they possibly swapped when the engine was rebuilt?

Kw69 · 08-25-2016, 08:57 PM

Just called my GM buddy and he said that he was pretty sure the heads are GM 350. He couldn't see why somebody would swap them out to a 307, even though they bolt up. The part number shows 350 on the GM site I looked at as well. Wow the mystery gets deeper!

**RenoKeene** · 08-26-2016, 10:31 AM

3932454 shows 68-69 307 heads. Check out Nasty Z28's site http://www.nastyz28.com/sbchevy/sbch.php
I'm just 30 minutes south of you in Fruitland Park.

**RenoKeene** · 08-26-2016, 11:06 AM

Ok, this site shows 3932454 as 307/350 76cc
http://outintheshop.com/faq/casting/heads.html
You wouldn't have the original exhaust manifolds do you?

08-22-2016, 01:39 PM	#1
Kw69 Registered User Join Date: Sep 2015 Location: Florida Posts: 111	Casting block question Hey guys, hope everybody's builds and projects are going good. I may have asked this before but the original engine that came with my truck has a cast number of 3956618. I heard that this block was only used for a few months and for just the 1969 series. I was also told it shared the 350, 327 and 302 internals depending on what vehicle it was going in including the famed camaro z28. The engine was pulled out and a new drop in was installed by the previous owner who has passed away. When I bought the truck, he said that was the origainl engine but had been rebuilt somewhere years ago from the original owner. Unfortunately I can't see the vin cause the deck has been blocked. I did find that this engine was made in 69 cause of the codes. I have a few questions though: is there any other location of a vin number? And is this a rare block cause of the casting number? A friend who has raced cars said that it was a rare block and it was a desirable one along with the high nickel content. Just figured I would ask. The engine right now is sitting in my shop. It's complete and I plan to open it up in the fall. My desire is to put it back in the truck after a rebuild if it needs it. The previous owner removed it because he said it smoked a little bit had no loss of power. So it may be something simple like valve guides, or seals... Who knows. Anyway thanks for all input. Kris __________________ 2009 GMC 2500HD 6.0, 6 speed auto, stealth grey, 4x4 Z71, Bilsteins, Black Bear Tuned. Pulls the 10k fifth wheel all so easy. 1969 CST 350 black long bed, 3 on the floor, PS, AC, drum brakes, old school and love it.

08-22-2016, 02:01 PM	#2
jr1000yarder Registered User Join Date: May 2016 Location: Pa Posts: 1,278	Re: Casting block question as far as I know you need the deck # to get you close...... I'm sure others with more knowledge will chime in __________________ IT IS WHAT IT IS

08-22-2016, 04:49 PM	#3
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,034	Re: Casting block question If it has the original intake post the casting #, also pull the valve covers and post the head casting #s then we can get pretty close. __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

08-22-2016, 06:58 PM	#4
Kw69 Registered User Join Date: Sep 2015 Location: Florida Posts: 111	Re: Casting block question Ok got the info: Block 3956618 GM5 A239 Intake 3927184 GM5 A269 Heads: 3932454 A319 GM17 3932454 H189 GM24 Hope this helps Thanks, Kris __________________ 2009 GMC 2500HD 6.0, 6 speed auto, stealth grey, 4x4 Z71, Bilsteins, Black Bear Tuned. Pulls the 10k fifth wheel all so easy. 1969 CST 350 black long bed, 3 on the floor, PS, AC, drum brakes, old school and love it.

08-22-2016, 07:03 PM	#5
Kw69 Registered User Join Date: Sep 2015 Location: Florida Posts: 111	Re: Casting block question All those come up as 1969 parts as far as I can tell by research. Now the head with the H puts in later in August. __________________ 2009 GMC 2500HD 6.0, 6 speed auto, stealth grey, 4x4 Z71, Bilsteins, Black Bear Tuned. Pulls the 10k fifth wheel all so easy. 1969 CST 350 black long bed, 3 on the floor, PS, AC, drum brakes, old school and love it.

08-25-2016, 02:19 PM	#6
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,034	Re: Casting block question Block is a 350 as you know but the heads are 307. The intake decodes as a 69 350 that came on a car not a truck. Are you sure that is the original engine that came in your truck? What part of Florida are you in? __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

08-25-2016, 08:42 PM	#7
Kw69 Registered User Join Date: Sep 2015 Location: Florida Posts: 111	Re: Casting block question The previous owner who swapped it out said that it was. It was rebuilt and painted blue some years back. But if u scrape off the blue there's orange undernieth. Sad to say he passed away last Dec. I spoke with him just prior and he was very certain that it was the original engine. i live in Ocala btw, my plan was to rebuild the oringal engine and put it back in. So quick question? How can they be 307 heads? Were they possibly swapped when the engine was rebuilt? __________________ 2009 GMC 2500HD 6.0, 6 speed auto, stealth grey, 4x4 Z71, Bilsteins, Black Bear Tuned. Pulls the 10k fifth wheel all so easy. 1969 CST 350 black long bed, 3 on the floor, PS, AC, drum brakes, old school and love it.

08-25-2016, 08:57 PM	#8
Kw69 Registered User Join Date: Sep 2015 Location: Florida Posts: 111	Re: Casting block question Just called my GM buddy and he said that he was pretty sure the heads are GM 350. He couldn't see why somebody would swap them out to a 307, even though they bolt up. The part number shows 350 on the GM site I looked at as well. Wow the mystery gets deeper! __________________ 2009 GMC 2500HD 6.0, 6 speed auto, stealth grey, 4x4 Z71, Bilsteins, Black Bear Tuned. Pulls the 10k fifth wheel all so easy. 1969 CST 350 black long bed, 3 on the floor, PS, AC, drum brakes, old school and love it.

08-26-2016, 10:31 AM	#9
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,034	Re: Casting block question 3932454 shows 68-69 307 heads. Check out Nasty Z28's site http://www.nastyz28.com/sbchevy/sbch.php I'm just 30 minutes south of you in Fruitland Park. __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

08-26-2016, 11:06 AM	#10
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,034	Re: Casting block question Ok, this site shows 3932454 as 307/350 76cc http://outintheshop.com/faq/casting/heads.html You wouldn't have the original exhaust manifolds do you? __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394



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