1987 big block

[tylermckee]

Alright, its not exactly a pickup, but its a 1987 fleetwood bounder, 34' motorhome. Chassis is a p30 chevy with a 454 big block. Engine runs and idles ok, but once you get moving it has no power, it will hardly move along, and after a few minutes it will just start to stumble and die. I'm assuming it has something to do with the rats nest of vacuum lines and emissions garbage sitting ontop of the motor. therer is no emissions testing here of any sorts, so if i was just to remove everything i dont need and plug everything off i should be alright? i need vacuum for my tans, heater controls, and vacuum advance, correct? what am i forgetting? Also can anyone point me where to find a good shop manual for a p30 chassis, ive looked around some but havent found much.