I am haveing a problem with my '77 Ram. When I got the truck it was running very sluggish. But I figured $450 was a steal so I took it. I replaced the valve covers, pcv valve, oil breather cap, a couple of vacuum hoses and fixed the front end brakes since they were ended up locking up on me.

However after all of this the problem remains the same except worse. I have little to no power with the engine just reving it's heart out. I have to floor it to get it to move and even then we're talking just barely moving. It seams to shift fine and works accordingly in all gears so I don't think it's a tranny problem. I think probably it's a vacuum problem or atleast that is what I am told. But what can I do as a basic check over?

Any suggestions are greatly appreciated as always!