Well, the machine shop called today with some bad news.

The block for the 283 that I was going to use is bad. There are some rust pits in a couple of cylinders that probably won't clean up at .060 over.

I know that .120 was acceptable years ago, but I really don't want to take a chance on that much overbore.

I'm going back to the original plan and use the 350 I have. It will have a late model Vortec roller cam block and early camel hump heads. I had trouble finding a decent pair of Vortec heads. They might flow good, but the Vortecs have to be the weakest heads Chevrolet ever made! I'm going to use a mild roller cam(Comp XE258HR).

Too bad, I think the 283 would have been perfect.