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Trying to put a Pontiac GTO 400 engine in my Chevrolet truck.

23 messages,  Last post on Jan 30, 2013 at 8:26 PM

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What is this discussion about? Chevrolet C/K 10 Series, Performance Mods, Truck

Messages Page 3 of 3

#19 of 23 Re: Trying to put a Pontiac GTO 400 engine in my Chevrolet truck. [Mr_Shiftright] by omarman

Apr 14, 2011 (10:18 am)

Replying to: Mr_Shiftright (Apr 14, 2011 7:59 am)
I don't remember Pontiac cast cranks and pistons from that era being trouble prone for street/strip use. Nodular cast iron or Armasteel (PMI - not steel despite the name) was used for most Pontiac V8 crankshafts except early super duty (racing) engines. Depends on your definition of "significant power" though.
 
For example, and maybe a true Pontiac guru out there can take a better whack at this, I looked up factory GTO Ram Air engines:
The original Ram Air 400/360hp ('67?) used cast crank and pistons.
Ram Air II 400/366hp = cast crank and pistons
Ram Air III 400/366hp = cast crank and pistons
Ram Air IV 400/370hp = cast crank and forged pistons
Ram Air V *crate engine* factory HP rating? = forged crank and forged pistons
 
Super Duty engines prior to the '73-'74 455SD used forged steel cranks. But other than the Ram Air V crate engine, was there any factory GTO Ram Air engine with forged crank+pistons? I'm thinking that if you are driving a Pontiac street machine and have problems with damaged cranks or "holed" pistons, there may be other issues causing that -- detonation, excessive wear or poor assembly?
 
If the OP was considering a Pontiac 326 swap into a GM truck for the street then forged crank and pistons sound like overkill to me. Just depends on how heavy duty the truck's purpose will be.

#20 of 23 Re: Trying to put a Pontiac GTO 400 engine in my Chevrolet truck. [num1pontiacman] by tjb1ham

Jul 07, 2011 (1:10 pm)

Replying to: num1pontiacman (Apr 14, 2011 6:36 am)
I am looking to put a Pontiac 400 into my '72 GMC Pickup (already have both).
 
To:num1pontiacman
You said you have pictures and info to do a stock parts bolt-in?
Care to share?

#21 of 23 Re: Trying to put a Pontiac GTO 400 engine in my Chevrolet truck. [num1pontiacman] by tjb1ham

Jul 07, 2011 (1:13 pm)

Replying to: num1pontiacman (Apr 09, 2011 10:52 am)
I am looking to put a Pontiac 400 into my '72 GMC Pickup (already have both).
  
To:num1pontiacman
You said you have pictures and info to do a stock parts bolt-in?
Care to share?

#22 of 23 Re: Trying to put a Pontiac GTO 400 engine in my Chevrolet truck. [num1pontiacman] by ssbelair64

Jan 30, 2013 (5:46 pm)

Replying to: num1pontiacman (Apr 09, 2011 10:52 am)
Hey im working on putting a pontiac 71 400 into my 65 chevy pickup. You mentioned that you used componants for a direct bolt in. Which motor mounts did you use?

#23 of 23 Re: Trying to put a Pontiac GTO 400 engine in my Chevrolet truck. [ssbelair64] by num1pontiacman

Jan 30, 2013 (8:26 pm)

Replying to: ssbelair64 (Jan 30, 2013 5:46 pm)
It is a combination of motor mount perches, motor mounts and the motor mount bracket that bolts to the block.
All 3 are needed. I can't post photos here, fire off a message to me at chris_r29hotmail.com and I will try and point you in the right direction.

Messages Page 3 of 3

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