OEM heads or aftermarket?
The longer stroke crank would be my choice with either type of head.
Aftermarket head allow better breathing for either stroke.
Build one short block of each!
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1977 Black Trans Am 180 HP Auto, essentially base model T/A.
I'm the original owner, purchased May 7, 1977.
Shut it off
Shut it off
Buddy, I just shut your Prius down... 
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