1989 F-150 108000 300 Straight 6 Manual Trans

This is what I have Replaced
)Ditributor
)Cap
)Rotor
)Wires
)Module
)Fuel pump relay
Can anybody tell me what a "clutch Troop" is or is my chain beingh pulled.
any way here is the problem come to a stop and it stalls even with the clutch pushed to the floor not to mention when I watch the rpms it fluctuates more than normal. Normal being a couple of hundred not thousands.