Whirlruss Bargains has this NOS Enginetech P1520(6)STD B Dish Top Pistons for 66-84 GM/Chevrolet - These pistons are built to factory specifications for the popular Chevy 250 engine, often used in trucks, vans, and cars from 66-84 - See images for dimensions and details - Fast replies to questions and comments - $69.99 with fast free domestic USA S&H!