What Camshaft For A Stock 1974 350?

[Cadillac Kid]

Hello everybody.

My truck is a 1974 c10 longbed, with a TH350 transmssion and a 12 bolt rear axle with 3.73 gears and the factory locker.

The motor is all stock 350 4 bolt main with a 4bbl quadrajet carb.

The truck drives nicely and has power, but you can tell the stock cam is chocking it up and get horrible economy. My 4,800 pound 472ci Cadillac gets better economy. I really want to swap the cam with something like an RV grind. Camshafts are an area that I'm not very educated in, and have always been overwhelmed by how many choices there are for the small block.
Too many! My requirements are smooth idle, great low end tourqe, and no more fuel consumption then I already have currently. I don't want to get involved in the heads or valve springs. I'd like to get a cam I can just drop in and go. Does anyone have any suggestions for something that would work for my needs?
I appreciate it.

Thanks

-Gavin