mine has the RST front fork and the top tube drops lower at the seat post - I could do it, but the carb would need to be outside the frame to either right or left, and I think I'd make the rear motor mount block much thinner
I'm not a hobbyist, but rather a maker of cheap transportation, so for me it isn't worth the hassle to make something that I would get about $2 per hour for all the extra labor involved
I've done similar before tho. so I know it can be done.