Heres the deal, I have a 2000 Chevy old body K3500 with a 454. it's got 62,000 miles and my poor 11 mpg is getting
worse. I figure plugs,wires,cap and rotor might help. Heres my ?'s. Do I have pull the top part of the 2-pc intake off to get at the cap and rotor. I cann't see a way around it,but I might be missing something.

Thanks Ed