[andyh1956]

I can give you a recipe for a 283 that I guarantee you'll like. Just like I posted earlier. Basic block assy w/ the power pack heads you already have. The stock dist w/ a petronix & recurve kit will do fine. I always used Headman headers. A set of z28 valve springs & retainers, a double roller timing chain, and a z28 hp spring for the std volume oil pump. A stock iron 4 bl intake w/ a Rochester 4-jet carb. For a cam use the old 350 / 350 cam pn 3896962. It will have a slight lope at idle & pull from the time you touch the throttle. If you can afford them a set of two valve relief pistons will give a slight comp increase or you deck the block .010" or both.
This will build a really good running 283.