first off i spun a rod bearing in my gsr. i read you can put the LS crank and rods in a gsr and it will bump the compression up and the ls crank is a little longer stroke. well, i want to know if i can still use the gsr pistons? the cylinders were done not too long ago, i can still see hone marks. i dunno who rebuilt it but someone did. i'm also wanting to know if i'm gonna have to hone the cylinders. i hear that there could be a lip in the top of the cylinder and the fact that the pistons are now going to go up farther than they did worrys me. i didn't really wanna take the block to a machine shop, but if i have too i will.