Hi Paul
Got a certain plan in store for my Mrs's HA Van - my old 1280 highly tuned motor out of the black one, modified with low compression pistons from a van motor and a VNT15 turbocharger running with a blow through carb from either an MG turbo or Renault 5GTT. Should be intercooled and hopefully will handle 10psi. Will start lower and see what we get. Long duration cam may be an issue, but worst case will make it a peaky screamer. Shame!!
The Shorrock can be a bit of a headache to work with, uses oil as part of its operation and unless in excelent condition, could be a bit fragile. Also due to the "flappy paddle" design, is limited in it abilty to produce much more than about 7-8lbs of boost. I seriously researched this option for mine, but the healthy Shorrocks always went for more than most Vivas are worth! A lot of money to invest in a nice idea plus all the drive system, manifolds and plumbing will have to be custom designed and made as I'm reasonably sure that 1) shorrock did not offer the kit for the OHV, and 2) if they did, the parts are all long gone the way of the dodo!
Got the VNT15 brand spanking new on E-bay - won't say how much......
Just got to convince myself that the VNT mechanism can take the extra exhaust gas temperatures that the pertrol engine will produce over the original designed application (diesel)
Not gonna happen overnight, The HA van is a resto project - give me about 4 years and maybe I'll be getting somewhere......
Tony