Quote:
Originally Posted by 66Submarine
Nice truck. As everyone else said, the engine seems like a normal 283 (or maybe one of the weaker variants of 327).
"1970 3.73 positraction if I can find a center unit"
Not sure what you mean by that?
Swapping to 4.10's from 5.14's will make your current engine speed at 50MPH occur at 63MPH or so. You might also consider using a later 14 bolt (1973 and later) rear end.
Make sure you don't go too tall and end up lacking power to go up hills in high gear. I personally wouldn't go taller than 4.10...even that isn't giving a 283 all that much leverage if you're trying to haul something and keep up with traffic IMO.
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I found a 4.10 GM HO52 drop out. I might install that and run it for a while to see how she hauls. The 283 needs to get pumped up a little with a 4 barrel and headers to make her breath.