Bob's Resource Website (2007)
Installing a Delco SI in an R1 Avanti

I got an email today asking me where I got the bracket to install the GM alternator on my R1 Avanti. I figure I might as well post the info here for all to benefit.

The install was simple, I used a standard one wire GM alternator, it gets mounted upside down (the alternator wont care). I had to redrill two holes, the R1 bracket is two pieces. I unbolted the 3 bolts that hold the small bracket to the large bracket, and moved the bracket to the front. Basically the front hole becomes the rear hole. Than I drilled two holes the same size as the others and remounted the small bracket in the forward pattern. I dont recall having to bend the arm on the bottom, but the pulley should live up fine in this location.


'63 Avanti, zinc plated drilled & slotted 03 Mustang Cobra 13" front disc/98 GT rear brakes, 03 Cobra 17" wheels, GM alt, 97 Z28 leather seats, soon: 97 Z28 T-56 6-spd, Ported heads w/SST full flow valves, 'R3' 276 cam, Edelbrock AFB Carb, GM HEI distributor, 8.8mm plug wires

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Some technical opinions are my own from experience, other informational data is from online sources with credits when available and while care has been taken to be as accurate as possible, it is offered only as a guide and caution should be exercised in the application of it.