R u on the last bore of ur cyls? If not its a waste to re sleeve a set with bores left. If you want a big bore that bad, send them to a reputable builder as stated before. Putting it together is simple, but tricky also. Ring gap, ect. Make damn sure u lube EVREYTHING with ur premix (crank, bearings, wrist pin bearings, cyls, ect) Good luck, let us know what u decide.