-small block olds- have number designated heads. -big block olds- have letter designated heads. My motor mounts in my truck were very easy to build. trans sits on the torsion bar cross member. the rear motor mount cross member from the 235 had to be removed. the engine looks factory in the truck except for the headers. manifolds would work but not on my truck wich sees drag strip time. If your going to put in a olds engine go to
www.mondellotwister.com and read up on the oiling system of the olds engine. you'll need to beef it up if you plan on buzzin one higher than 5000rpm.