|
It is likely a Muncie SM465. The grinding could be a clutch issue, not fully disengaging when the clutch pedal is depressed. It may be due to be replaced, There is a chance the clutch could be related to the lack of power issue also, it (the clutch) may be slipping.
You may be due for a complete tune up, points, plugs, cap & rotor, wires, maybe a carb rebuild.
The "winding" noise is probably the rear end gear, with the truck being a 20 series with a manual trans. It could be in the 4.xx:1 area.
|