That's probably true...but there could be a market, it does make a neat bike. The frame my friend made was light weight, and the engine area, backbone, was sized more for the 45 engine so it looked like it belonged. I would imagine that a 45 in a BT frame leaves a lot of wide open spaces. The frame was as long as a BT frame though, or at least from the seat post tube to the rear axle so that the oil tank, rear fender, etc. fit normally. I'm not super tall, but tall enough that I didn't want a short and squatty little bike. Thought it was a good looking bike, but don't have any pics of it! Do'h. Only one with a panhead sitting in front of it, so you can't really see much.
That bike was stolen out of my garage in Spokane Washington in 1976 I think, and I'm pretty sure they thought it was a BT, unless it was someone I knew. But it happened in the spring, a week after I had it out for the first time, so I think someone just spotted it driving by.
If anyone has ever seen such a frame or bike I'd be interested in hearing...not for revenge or to get it back, I'm sure the parts and frame, or possibly the bike, have changed hands many times, and the stat-o-limitations has long since past. But I'd sure buy that frame back if it still exists in someone's garage or parts pile. Had square tube/stock for the motor mounts, but that's about it for I.D.'ing it. I think I'd know it if I saw it.
Okay how's that for hi-jacking? Sorry.