Notice that both 403 and 295 pistons have a chamfer. I don't know if they are they are the same size or not. The dish on the 403 piston is listed as .085. The dish on the factory piston measured by Crow is .060. The 403 piston has a height of 1.640 and the 295 is 1.655. Mitch can you provide by measuring the dish depth and compression height of the pistons that came out of the engine? Thanks Jay 6155