The only turbochargers we used were Rajay units back then. An E flow Rajay on a 350 cid engine would push 10psi plus with a 1.0 A/R ratio on the hot side.
We ran a looser 1.3 A/R on the big blocks. Back then it was common to size a turbocharger to max out with the engine to build a system that would work without an exhaust wastegate.
Gale used a dogleg intake with a pad for the carb that put the top of the air horn below the centerline of the compressor on some truck installs. That was ok for a smallblock, but on big block it was restrictive with that short turn in to the compressor inlet. we saw icing on those manifolds, especially the one with the carb near the passenger side headlight.
Most motorhome kits had a higher carb mount. Which setup does your friend have? Which turbocharger, Garrett TO4B or Rajay E series?
