A hint... they done make em any more.

 

a 409 or 348?ive never seen that block or head before but then im not old enough for those two motors.i cant see the block that good if dist.in front or back.could be a olds 350/455 rocket.

 

I think its an old buick motor.

 

Looks mostly like a nailhead Buick. Is it even a GM engine?

 

hmm got me stumped

 

Yep, its a GM. The parent of this engine started it all in 1964.

 

is it a pontiac motor.the gto came out in 1964?389ci.

 

pontiac

 

pontiac
326 maybe?

 

It's not a Pontiac engine of any sort. It's not any type of Buick or Oldsmobile engine either, and certainly not a Chevy engine - so I am going to guess it's probably some sort of Cadillac engine.

 

or could it be the 307 (327 stroke, 283 bore) or could it be the L97 327?

 

Yep, its a Pontiac. 400 CI made for the 69-1/2 GTO. But they decided not to release it in the car from the factory.
So they sold it as a crate engine for $2000 and some were dealer installed and some customer installed ans some race car installed.
They called it the Ramair V and it had all forged stuff inside and revved much higher than the RA IV 400.
My buddys doing it up for a customer right now. I'll post the HP it makes when its tunned.

 

Pwned maybe u should be driving a camaro instead of a formula

 

its been along time since ive work on a pontiac motor. my first engine i worked on was a 72 400ci in a catalina.i should have known by the blocks two threaded bolt holes in the valley were the valley pan bolts under the intake and were the water jackets are. but never seen heads with those dividers in between the intake ports. i know that creates more volcity. pontiac motor are scarce they arent as easy to find as they used to be.didnt some of the 69-70 judges have that motor in them?

 

na pontiac got nervous and didnt put it in the 69 gto or firebird. was only sold over the counter.

 

Was going to say a buick rocket unitil I saw those ports. Dunno

 

I was gonna say it looks like an old Poncho motor to me.

 

Somebody better start guessing LSX so this thread can continue to live in here

 

Sorry, I know its off topic and old iron, but I thought some of you firebird guys would like to see a real RA V engine.
When I was a kid we used to blow up an awfull lot of RA-III and RA-IV engines. GTO,s were cheep when i was a kid.
By 1978 GTO's were $1000 for a nice one that needed some work. $500 for a running parts car, and $2000 got ya a nice one all original. Between my buddies, friends, and brother in law we blew up, totaled out, and parted out some rare Iron.
Makes me cry now. What a sin.

 

As soon as I saw the lifter valley and heads I knew what it was.