im still having some trouble trying to get power from my 84' truck. i thought i was having carb problems but now i think timing could be the culprit. my truck makes full power and falls flat on its face at 4000 almost every time. could my vacum advance not be working properly? i have another dist for this truck.

87 4runner 33" bfg mt's no lift. dubbed the marine by my frinds. dead as of august 14 2005. 84 ex cab p/u 33"a/t, 3" suspension+3"bodylift, thorley header and 2.25xhaust, downey midrange cam+rocker set, very milled head! NO RUST!