[68gt500]

Since your motor is 80-100 cubes smaller than the FEs running 40mm++ Venturis, I for myself would start at the stock 37mm size and only increase them IF need arises.

Your cam should be ok. Most problems seem to come up when the lobe separation goes down toward 106 or so degrees.

The base jetting for the 48s I got was

Idle: 70
Idle holder: 120
Emulsion tube: F7
Main jet 135
Air Corrector 120
Venturis 37mm

The Accel Pump - I don´t know.