Correct me if I'm wrong - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Chevy nutcase · 06-30-2023, 02:04 AM

Cruising the depths of marketplace for a local small block for a rebuild and I saw this. Ad says it's a 350 from an 80s pickup and I wondered why there was only 1 accessory hole in the heads. Then I saw the backside and I'm guessing they swapped sides with the heads for whatever reason or is there a breed of cylinder heads that are supposed to be like this? It's been a while since I rebuilt an engine

**Warrens69GMC** · 06-30-2023, 08:45 AM

I believe that came from a 86-87 truck or van. 1pc rear main seal, 193 heads and 210hp.

**Chevy Fleetside** · 06-30-2023, 09:25 AM

That is an 86 to 92 350. You will need to use an electric fuel pump. During casting they blocked off the fuel pump hole. I know the BB of that time did not. I have an 87 engine and this is how I know. Also the center bolt valve covers.

**Warrens69GMC** · 06-30-2023, 10:08 AM

Quote:

Originally Posted by Chevy Fleetside

That is an 86 to 92 350. You will need to use an electric fuel pump. During casting they blocked off the fuel pump hole. I know the BB of that time did not. I have an 87 engine and this is how I know. Also the center bolt valve covers.

86-89 you could still get a mechanical fuel pump in the R series. It needs to be checked if wanting to run the mechanical pump.

I say its 86-87 because it doesn't have the lifter valley bosses cast into it.

SCOTI · 06-30-2023, 10:48 AM

Quote:

Originally Posted by Warrens69GMC

86-89 you could still get a mechanical fuel pump in the R series. It needs to be checked if wanting to run the mechanical pump.

I say its 86-87 because it doesn't have the lifter valley bosses cast into it.

x2.

MikeN · 07-06-2023, 11:09 AM

As far as I know there has NEVER been unique left or right cylinder heads for any SBC. They all fit either left or right. On a used engine it's always possible one of the heads has been swapped for a different casting number or model year.

06-30-2023, 02:04 AM	#1
Chevy nutcase Registered User Join Date: Mar 2021 Location: Hershey Pennsylvania Posts: 339	Correct me if I'm wrong Cruising the depths of marketplace for a local small block for a rebuild and I saw this. Ad says it's a 350 from an 80s pickup and I wondered why there was only 1 accessory hole in the heads. Then I saw the backside and I'm guessing they swapped sides with the heads for whatever reason or is there a breed of cylinder heads that are supposed to be like this? It's been a while since I rebuilt an engine Attached Images

06-30-2023, 08:45 AM	#2
Warrens69GMC Registered User Join Date: Jan 2003 Location: Safford,AZ Posts: 3,625	Re: Correct me if I'm wrong I believe that came from a 86-87 truck or van. 1pc rear main seal, 193 heads and 210hp. __________________ 1969 307, t350 1950 Chevy Wagon 1978 Big 10 1967 C10, 250,3-OTT

06-30-2023, 09:25 AM	#3
Chevy Fleetside Registered User Join Date: Sep 2006 Location: San Francisco Posts: 4,782	Re: Correct me if I'm wrong That is an 86 to 92 350. You will need to use an electric fuel pump. During casting they blocked off the fuel pump hole. I know the BB of that time did not. I have an 87 engine and this is how I know. Also the center bolt valve covers. __________________ "A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536

07-06-2023, 11:09 AM	#6
MikeN Registered User Join Date: Oct 2007 Location: Marietta, GA Posts: 805	Re: Correct me if I'm wrong As far as I know there has NEVER been unique left or right cylinder heads for any SBC. They all fit either left or right. On a used engine it's always possible one of the heads has been swapped for a different casting number or model year.



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