hey everyone im new to the site would like to give a bit of info about my Truck. Its a 1980 RamCharger 4x4 with a 5 1/2 inch lift and 35 inch tires, with a 318 smallblock, everything is stock other then lift kit and tires. the truck is well over 1000000 kms but the engine is not original and it came out of a 1979 1/2 ton. now ive been getting a popping noise in the area of the carb and distributor. im not really sure what is causing it to do this but its got a rough idle and i find it hard to start. also it lacks power. ive changed plugs and wires aswell as cap and rotor. im really not sure what else i can discribe. thanks for the help in advance.