For those of you you who may be interested, there's a set set of Speed Pro, #7543P pistons, in standard bore (if you're willing to take a 283 out to 4 inches, or have a good 4 inch bore block), on that auction site we all know and love. $149.96, and that INCLUDES shipping; you can't really beat that price. They're not mine, nor anyone's that I know, BUT, I did buy a set of them (there were two sets for sale), that I'll probably just flip. They have some large domes, but you can always mill them down, or use large chamber heads. If you're interested, there you go, if you're not, you're not. I am Butch/56sedandelivery.