no, that V12 would be the 'twin six' which was
GMC's big truck engine .... I'd shy away from the converted GMC bus, it's a transit model [city rig] refered to as the New Look or Fishbowl [60's to early 80's], probably with a 6V71 diesel, and they don't make very good highway travlers - some one put some effort into it tho', so if it's cheap enough it might do, at least for a guest house out behind the garage
Bill
