JMO But I had the "kit" installed at the dealer and if I had it to do over I'd take it to an indy and have them bore the cases and BUILD the engine rather that assemble a kit. I think the kit is around $1600 and they charged 6 hrs labor. BUT thats only a small part of a correctly built engine
When I did my 103 I gathered all the parts (103 Kit-eBay $420, SE Heads, Adjustable Push Rods I already had the Cams) and had a HD Mechanic friend and myself do it in my Garage, Total Approx $1500 for a 103 Stage III
Mine was about $2400, but that included almost a grand for an exhaust system. At an indy shop. I highly recommend a good indy as moco has to build a more compliant engine at least they do here in CA. I did some comparisons before I did mine and the most I could get from the dealer was about 92hp and about 94 tq.