Okay needing some advice to figure out what pistons I'm going to run, stock 4v heads, .020" teksid, ported 03-04 Mach 1 intake, looking to push 750 to the wheels through a built 4r70w running e85 with a b/w s480
I would go with some flat top Gibtec billet pistons. Mine came in at only 384 grams! They will come with the proper size pin for your application and Total seal rings. Opt for a napier 2nd ring. They will cost the same as any off the shelf piston/pin/ring package. When you order, specify a flat top piston for 10.5:1 compression and the most compression distance possible and around a .170" skirt.
I wish i did, but when I did my build, I went with -6cc Weisco pistons. They had really good specs for off the shelf options. I have ran 30psi with no issues thus far. also a 20 over teksid.