well it cost me about $2400 to do my 4mm dune ported build, but I bought everything new and did it correctly. Extra weld on the crank, maxload bearings,good intakes, carbs, and reeds, ported for the 4mm with cut domes(none of this spacer plate BS),billet basket, good clutch,pancake, the whole nine yards. I'm sure you could do it for allot less but I chose to do it right the first, and hopefully the last time. It's really up to you how much you want to spend. IMO spend the cash now before you spend it later on fixing it.