yes and what exact motor are u talking about??? the 8.1 big block out of the 00-07 3/4 ton 1 ton is a 8.1l or a 496 not a 502, also THIS SWAP IS A PAIN!!!!! ive done one or tried i guess u could say me and the kid that i was helping split ways before it was finished, and still does not run. but for the money that it would cost to do a 8.1 u should just build a lq4 408 stroker, also what do u have 4.3 or 4.8 if 4.8 they arnt that bad i dont see a huge advantage over a 5.3 but they both can go up to a 383 stroker