Turbos

I have an Air research turbine through a BAE plenum under the carb. BAE turbos are evidently not in business any more. I think the installation may have been a kit from BAE, (maybe a Rayjay turbo kit?). It is installed on a 391 Ford industrial engine which is in a 1969 Newell motor home. This is really a skookum old rig and I would like to get it in good running order but I have zip info on the specs and tuning data for this old unwastegated turbo. Carb is a holly 4bbl that I have just had rejetted to .052. Does any one have any info on this old turbo set up?