I just got my 102 mm FAST intake and 102 mm FAST throttle body, FAST fuel rails and some 42 lb injectors and the 215cc AFR Mongoose heads will be here in a week or two. Are these injectors too big/small for my setup? 02 WS6, 231/234 .644 lift comp cam, kooks long tubes, off road y pipe, borla exhaust, powerbond pulley, slp lid. Also, will I need a new fuel pump?

 

I was around 78% duty cycle with my 42's running a 226/238 .604 lift, PRC 243's & a Fast 90 on my stock fuel pump.. I think your 42's will be fine, but I would probably look into a better pump to be on the safe side.

 

^ I agree. Your 42's should be just fine and probably a better pump at the point you're at.

 

Yep, 42s will do it.