There should be zero cost to make it fit(okay $2 for a neoprene plug) if you have the tools. He didn't see big gains at 6psi, but if he raises the boost then he will. He also had a stock LS exhaust exh. manifold... very restrictive. Anyway, I am doing the conversion for a B20Z, and I think the extra .2 liters at 8psi will totally utilize the M62.