im pretty sure the rods will actually fit, its just the rod ratio will be undesirable......, like an ls vtec, people take gsr or type r pistons and rods and put them on an ls crank, not sure how well the gsr pistons in an ls head will do, i actually thought the gsr pistons were the same as ls pistons but the combustion chamber area in a vtec head are smaller creating the higer compression, but im not for certain.....