There is a lot to consider if you're planning on jumping into this. The deck must be redrilled to the new head bolt pattern. Custom side plates need to be made as well. It's a bit more than just cutting and welding the heads, there are gaps that must be filled in. Intake, exhaust and a valve cover are all custom units. It is, with out a single doubt, a labor of love. An awesome thing, to be sure but massive amounts of work. Larry's lump ports are way easier. Don't get the wrong idea, I don't sell for Larry, I crew for Leo! I may build a mellow one for my truck, just to be different but I know the work involved.