1951 F4 loses power in 4th gear?

[GregTX]

While driving my F4 my truck loses power. I can only drive in 2nd or 3rd gear. Do you guys think this would be a clutch problem? I have had the truck for a year or so and am not sure when the clutch, pressure plate, bearing was last replaced.

I usually take off in 2nd gear. I notice when I shift to 3rd and 4th the gears seem to grind a little. This usually doesn't happen. When I stopped and shifter back to 2nd, the flywheel seems to be spinning still because it grinds quite a bit.

I know a good mechanic who bleeds Ford blue and knows quite a bit about these classics, but I wanted to hear what you guys think first.

Thx!