I had a 57 Pontiac with Rochester FI. The injection pump was driven off the distributor. They used to shear off a drive pin in the shaft that went to the pump but I don't recall seeing the distributor pin sheer.
1951 3800 1-ton "Earning its keep from the get-go" In the DITY Gallery 1962 261 (w/cam, Fenton headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.
