i've got a built 4l60e w/a yank converter i also have a set of custom oliver 6.2 inch rods a set of je custom forged pistons to go with the rods a stock crank and a block that needs sleeves i went 7.0 @99mph 1/8 with this set up a set of ported ls1 heads and a 200 shot, if u sleeve this block you can probably spray it harder i never lost oil preassure and it never smoked