Raider was running fine for the last couple of months since I installed the Weber carb, but yesterday evening and this morning when shifting into 4th and 5th gear, it felt like I was trying to drive into a 100mph head wind.
Previously have installed rebuilt 5sp transmission, replaced plugs and wires, and changed all gear fluids (diff,transmission, and transfer case.
Any ideas as to what may be causing this lack of power in the higher gears?
Thanks


1987 Raider, 2.6L, 5spd, Weber carb