The 8620 billet steel that the cam is made out of will wear the fuel pump arm completely in two in a very short time, it is only compatible with the softer cast iron material flat tappet cams are made out of. An electric fuel pump is going to be your only option when using a roller cam in these engines.
Also, a bronze distributor gear is also going to have to be used, the stock gear will disintegrate in a few minutes of running on a roller cam if you don't.
