I wouldn't be interested, although it is a novel idea. For me vintage pattern is about the whole package: tuning an engine, sounds, smells, friends, a little oil, pipes, maneuvers, and reviving something once very popular. Call me greedy, but I can't get all of that from a foamy.
On an interesting note, I did mention it's about reviving something once popular. With the rising interest in smaller electrics I think they could be a way to draw more interest to this wonderful facet of aeromodeling, if some (including me) can get past the 'heresy' factor.
Interesting thought, but not for me. I do, however, think there's more to this idea than meets the eye.
P.S. I would like to see a pipe slung under an 049! I'll have to put that on the 'things to try before I die' list.