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oilstainedjeans
Tribal Scout

USA
1 Posts

Posted - 21 Dec 2017 :  3:49:44 PM  Show Profile  Reply with Quote
I am new to Pontiac engines ,, I have what I was told is a 389 from a 1970 GTO but checking the numbers it appears to be a 1970 400 ,, the block casting on the rear passenger side reads 9799916 ,, the stamped numbers on the front passenger side are 20P272540 ,, YU ,, any assistance would be greatly appreciated

Bill Boyle
Horse Feathers (Charter Member)

USA
5088 Posts

Posted - 21 Dec 2017 :  4:10:06 PM  Show Profile  Visit Bill Boyle's Homepage  Reply with Quote
Indications point to a 350 Pontiac, not a 389 or 400. 99916 indicates '70 block, YU shows it to be a 2 barrel version per Pete McCarthy's book.

"Dedicated to keeping the classic Pontiac engine alive."

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400 bored +.030, forged TRW pistons, ported 62 heads, Hedman headers, 2.5 SS dual exhaust X Pypes, Comp 276AH10 cam, Scorpion 1.65 RR, 850 Q-jet, stock intake & tuned HEI; original owner.
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