This sums up most ironhead owners nowadays. To me it's like any old tech bike, whether it's an old Kawi, BMW airhead, or ironhead Sporty. Points ignition, carbs, crappy charging systems, and all the quirks that used to be part of riding a bike, now disappeared from maintenance issues (mostly), make the old irnoheads seem hellishly unreliable. If you're in for a wayback machine, and for the regular maintenance, then the ironhead could work. I would rather have the evo for the updated parts. And if I were going to run it hard, I'd rather have the Buell lump, just because nearly every part of it is upgraded for the increased loads of performance use, or to make more power. And the blacked out engines look neato. I salute your rough plan. Do it! ETA: There are chain conversions for the newer sportsters, so you're not stuck with belt.