The wheel adapters I've seen, the short lived savage 5t had them, a really stretched savage xl with the 5t body on it, and it was electric only. I just had a jaw drop moment thinking of a big gas engine in a savage, then my eyes popped out emigining a Taylor big block. But I think some dreams...
Yes, long discontinued, at the time it was the hpi sister brand hot bodies that listed them. I think it was for two.21 engines. If you want less hassle and more power, drop in an lrp .32. Two nitro engines adds so much more fitting and then the tuning. But for the cool factor it's irresistible!