A friend of mine bought a complete McKee race car in about 1980 or so. He pulled the (very crude) body off the car and installed a Lola MKIIIBg/t body - and drove it on the street! His had a built-to-the-teeth SBC with Webers. Ran great. There's a significant drawback to the McKee transaxle. To fit it in the available space the tailshaft - and reverse - has to be removed. I pushed that car out of parking spaces on MANY occasions! We tried not to park in spots that couldn't be driven thru but sometimes we'd take it to lunch in Ann Arbor and we didn't always have a choice of spots. The car drew a crowd wherever we went.
Sold it to buy one of those little Lotus' that looked like a tow truck. His had a 215 Buick and 180 degree headers. But that's another story.
Dan