Quote:
Originally Posted by 66gmcman
Hi i just got my trucks home. I got 2 1966 gmc 1/2tons. Ones a parts truck with a 283 and the other is my good one with a 6 banger. Reading this thread got me thinking maybe keeping the 6 banger and fixing it up like these tricked out ones on this thread. Question i have is what kind of output or horsepower can be had with doing these 6 cylinders right?
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Depends on which one you have. Your GMC could have a 230,250, or 292.
230: Flat top pistons. 4 inch side covers.
250: Dished pistons. 4 inch side covers.
292: 6 inch side covers and fuel pump in the center.