[Vegas69]

There were a few factors. Weight, GM Engineering, and last but certainly not least, history. The 540 idea came and went pretty quickly. I had to be a little economical. This allows me to reuse my pistons, carb, clutch, and fuel system. Going 540 would have added 50 lbs even in aluminum and my components just aren't ideal. This should provide all the power I need to do what I intend. Pretty sure I found the only resale block for sale in the US. It hasn't been used but I saved about $900 over getting it at the parts counter.

The usable RPM won't change to much from the old motor. My exact words to him were, "This car is 50% race and 50% street" I don't want to give up my highway cruising drivability but want it to rev higher. I'd say it will have usable power from 2500-6500. Redline should be in the mid to high 6k.....The cam is still up in the air.