Motor ID

[Turtleman]

I seem to run into more stumps than I can mange..
I really need to find out what motor is in this truck,, I knows its a 350 short block but cant find out what year or what it came out of.
The stamp on the casing behind the right side head is 3970010... or at least that's the best I can see of it,, its so tight in there I have a hard time accessing that to see.. I see no other cast numbers.
I've been trying to convert to disk brakes and power steering but I cant quite get the correct Power Steering unit or mount brackets to fit on the motor.

[dougf]

Your on the right track, I have the same casting:


Then I had to look at the pad under the front of the passenger cylinder head, you will have to get a light and peek behind the alternator, and possibly wire brush and wipe with solvent like I did to get the suffix code:



Then I went to: http://www.nastyz28.com/chevy-engine-code-stampings.php

Which told me I had a 165hp 1975 350 instead of the 327 the guy I bought it from said it had. Post some pics and let us know what you find!

[Slow Build]

According to the list I have 3970010 would be:

1969 302, 4 bolt main
or
1969 327, 2 bolt
or
1969-80 350, 2 or 4 bolt

The power steering brackets will probably depend more on which water pump you have (long or short) and which heads (with or without threaded holes) than year.

[dougf]

Roger, the front pad data will narrow it down and pinpoint it.

[mud.man.rj]

The year is on the opposite side of the block from the 3970010 cast #. To decode as a reference may be letter...H 15 6 so H is month as in in 8th month so Aug 15th 1976. Tricky part is engine # 3970010 I believe runs from 68-78 so if it end in an 8 for instance could be 1968 or 1978, bad move on GM's part, usually if you run into that you use the cyl head #'s to get closer but as in a short block kind of hard to know what heads. Also list as a 2 or 4 bolt block, only one way to find that out, pull the pan.

[Captainfab]

The year of the block has nothing to do with finding the correct power steering pump or brackets for it. As slow build said, it has more to do with which water pump you decide to run, short or long, and which heads. All trucks, 72 and earlier came from the factory with a short water pump on the V8's. The heads did not have the accessory holes until '68.

[PGSigns]

Post a picture of the front of the engine showing the setup of all the accessories on the front of the engine and then tell us what the problem is you are having with getting the power steering setup. That way we can guide you in the direction of the correct pump, brackets and pulleys to get you going.
Jimmy

[60-66]

I agree with all posts above , need to see the front of the engine , water pump and harmonic balancer have more to do with the actual fitment than the year of the engine.

[60-66]

Also , TYX suffix is a 350 from a 1975-1977 Chevy truck with a manual transmission.

[par4tom]

I have that same block number you have and mine is from a 1978 GM of some type. Mine was a 2 bolt main that I converted into a 383 stroker with aluminum heads. I don't know if yours is a 327 or 350 but that won't matter for your situation as the block is the same. Most likely, your's will be a two-bolt main. My dipstick is on the drivers side. Your real issue here are the accessory holes in the heads and the type of water pump you are using.

I wen to a long water pump as the short water pump was too difficult to work with for all the accessories I needed. The short pump also created too many headaches for mounting the power steering pump, etc, etc. It was a REAL pain to get enought clearance between the block and the pump.

For starters, I would recommend the long water pump as it makes mounting accessories like power steering pumps easier. The second issue is going to be if you have a front motor mount.

Because if you have the old "horseshoe" type front motor mount, you will have clearance problems with the power steering pump if you chose to mount everything like I did.

With the horseshoe, you will either have to grind part of the flange off of the mount on the drivers side in order for the powersteering pump to clear or you will have to go with side motor mounts. I had to change to side mounts for the larger 383 harmonic balancer and for the power steering pump to clear.

But if I'm understanding your original question on fitting a power steering pump without accessory holes (and we do need pictures to be sure!!!), I installed my system without using the accessory holes in the heads on the power steering side (drivers) by hanging the power steering pump off of the water pump using the March Brackets system.

And, there is no need to go to a March bracket system like i did ...because these brackets for this configuration are available in steel as well.

To summarize, I solved the problem on my 61 C10 by going to the long water pump, going to side motor mounts and hanging the powersteering pump on the drivers side down low...it works fine and is one solution for you to consider.

Good luck on your project...and get those pictures posted!
Tom

[Turtleman]

Great Replies here folks.

Yes it is a long water pump,, here's some more specifics.. I'm converting to all 87 brake and steering,, so normally I like to keep as much as I can all the same year,, hence,, the steering pump is off a 87.. not necessarily a problem.. (metric.. ACKK!).. The ID I was able to see after removing 3 gallons of paint that covered the imprint so I could almost see the letters!. It's as best I can see K1117 TYC



The long water pump looks to be the 8" balance



I bought a mount kit from ICT Billet.com Item # 551522. According to the instructions for that mount it requires a half inch spacer behind the steering pump.. BUT!,, the 87 pump has a spacer already fixed to the back side,, normally thats OK except the mounts holes are to small to fit over the pumps spacer,,, The Kits mount wont fit without causing incorrect angle for the pump ,, Drill a larger hole we say??... hard to do without removing the remaining metal for support,, (I think the mount arm would break) .



So thats where I was at... Heck with the ICT kit,,, what OEM mount bracket will work on that motor with a 87 steering pump?

[Turtleman]

By The Way

I love that engine compartment par4tom.. Thats a "Great" Job

[par4tom]

Thanks Turtle...

I am not familiar with the 87 pump, but you COULD go to the Saginaw A type pump and use the brackets you already have and then you are only dealing with a pulley alignment issue.

It seems to me you've got to get that bracket for the power steering pump mounted to the water pump first and then get a pump to fit that bracket. From there, it becomes a pulley alignment issue.

How set are you on running that 87 pump?

[Turtleman]

It seems to me you've got to get that bracket for the power steering pump mounted to the water pump first and then get a pump to fit that bracket. From there, it becomes a pulley alignment issue.

Right,, thats just what I'm doing, thats why I wanted to check and make sure I get the Correct Mounting bracket,, hence finding the motor ID.. (I still cant find the ID info ,,, LOL). I'm not bent on keeping the 87 steering pump but I already have it, I'm past a 30 day return but I'm a good wholesale account there so maybe they'd just swap it out,, I dont know.. The ICT bracket is fine,, its just that one spacer otherwise it would fit fine.. the shaft on the pump is long and the pulley I can get aligned... (I have big hammers)..

In my brain it would be allot easier to just know the correct bracket to use for that motor and pump.. if there is such a thing. I dont know

[par4tom]

I went and looked at that ICT part on-line. If your pump is exactly like the one they show in the photos it looks like your bracket bolts to the "horseshoe" front motor mount holes.

Is it the lower bracket that is not fitting? It looks like it should pretty much "plug and play".

You mentioned a spacer on the back of your pump, is that where the lower bracket bolts to the back of the pump?

[Turtleman]

Correct if you looked at the very last image at that vendor you see the threaded post the lower bracket mounts to.. theres a .22" spacer they provide for that post..
http://www.ictbillet.com/sbc-power-s...ock-chevy.html
If you also see in the image above the steering pump has a small spacer already attached,,, same size ".22". The 2 ,, 5" spacers that come with the kit for the lower mount bracket fit the pump perfectly "Except" for the one spacer attached to the back of the pump.. IF I attach the mount bracket (lower parts) it's wider at the pump side than the motor mount side,, hence a "V" or spread on the mount bracket,, (mis-alignment).. The top fits fine.

I see 2 options:

1. drill a larger hole in the back side of the mounting bracket. That will leave me with very little material in the mount bracket and I worry about a bracket failure.

2. Find a OEM Bracket for that motor that will accept a 87 pump.. I think all 350 are the same and the bracket is a "One Size Fits All" but instead of guessing I'd rather know the real ID of the motor.

[mud.man.rj]

I don't think the original steering box on the frame will except the new style ends of the ps hose that go into the box, may have to change box up too if going with all 87 parts.

[Turtleman]

The steering gear box on the frame is a 87 gear box,, that's why I bought a 87 power steering pump...

[par4tom]

Why not take the threaded post out of the back of your pump and use a bolt into the back of the pump through the bracket?

[Captainfab]

I believe there are 2 or 3 different PS pump mounting brackets for a long water pump. They will be for '73-'87 in the trucks or '69-'87(?) in the cars. Is the PS pump mounting boss on the water pump threaded or is it a smooth bore?

I posted some more PS pump bracket info in this thread a couple days ago.

http://www.67-72chevytrucks.com/vboa...d.php?t=671871

[Turtleman]

Why not take the threaded post out of the back of your pump and use a bolt into the back of the pump through the bracket?

Funny you mention that.. I thought of doing that but was concerned that I might damage the pump..

I believe there are 2 or 3 different PS pump mounting brackets for a long water pump. They will be for '73-'87 in the trucks or '69-'87(?) in the cars. Is the PS pump mounting boss on the water pump threaded or is it a smooth bore?

There are 4 types shown in my vendors orders system.. they vary depending on the make/model/year,,, thats why I started this thread so I can find out what the motor is so I can make sure I have the right mount..
The bore in the water pump is threaded

[par4tom]

There's the problem, that bolt comes out. Use the shim or washers to get your spacings correct. Mine has 3 or 4 in the back and 1 in the front...look at that last picture on the bracket company website, it is using another bolt.

[Turtleman]

I should write a Book about all the things I Don't Know.

Problem solved, now its just alignment of the pressed fit pulley..
Thanks Everyone so very much

[par4tom]

Good to hear... Just take your time on aligning the pulley now...