yes thats what im saying useing the p30 pistons in the gsr block because they do have the same bore.Ok let me make this clear sorry if i didnt explain it right. i wanna use a gsr bottom end and just put my p30 pistons on the gsr rods slap my head on the gsr block and off i go. Will this work and is it worth the money to get the gsr block or should i take the 600.00 and build my b16a3 block??

thanks tim