New member, New truck, Working out gremlins

[Rhoff2009]

Hello Everyone,

I just recently joined the forum after getting my 66 c10 fleetside. The truck has a 305 with a 4 speed transmission. I was probably 5 minutes before I started tearing into it. Already I have the carpet and seats replaced. And plan on moving to the suspension.
I've been trying to eliminate the driveline noise from the truck but really have no idea what the actual problem is. I keep hearing a whining noise when I step on the gas, but it stops when I lift off the gas.. I know its coming from the vicinity of the transmission, but I can't tell if its the throwout bearing, carrier bearing, or the driveline just makes that much noise and I just have to deal with it.
I don't know how the old 4 speeds are about gear noise, but that would be my next guess. I was really hoping that when I added the carpet padding on the interior it would at least lessen the noise, but that isn't happening. I want to hear my exhaust, not the whine. Hopefully I can figure it out but its not going to stop me from enjoying the hell out of my new toy. Any help would be appreciated.

Thanks