I have a turbo which was recommended for a P90 head with metal head
gasket ARP head studs and around 10-15psi boost. It says Rayjay on
the compressor and the nameplate says Rotomaster. The model no. is
3AA1EE60B1. I have pics of it at http://www.hampleman.com/turboz.htm. It
would help if I just knew the a/r at least.
Dan