Nola914, that's one of the msds T4 kits...however got some repairs/ hacks to it, proll'y from some of the PO's and that wicked granite injection
The Blow off valve has been changed out from our Impco brand to a BAE brand. Both function the same but look different.
BAE (Bob McClure) unfortunately lost his life in an aircraft mishap--the direction of the company sank and evaporated.
We built T4 kits from 1976 thru 1986, and currently not in production. PM me and I'll provide you with the 5th inj. circuit for enrichment.
There is one perfect 1976 turbo 2.0 running in L.A. with our system, it belongs to a guy in the Black Porsche Owners Club/ L.A. We originally built this for his Dad 30 years ago.
Marty