That is good advice from Chief. I done mine myself, which I understand not all people can do that, but got the long block redone completely for $1100, with all new parts, the only parts I reused was the block, crank, rods and head, Fuel injection system, etc. . Had Block boring, crank resurfacing, rod resizing, head machined, new guides, valves, springs, rockers, pivots at a machine shop for $600. Rebuild kit for the 4.0 H.O. engine for $385 shipped, new pistons, cam, lifters, full gasket set with valve seals, oil pump, timing set, Rod/Main/Cam bearings, freeze plugs. The rest was misc. parts. like new belt, plugs, etc.