318 LA torque?

So what cam do you have in mind? And the rest of the build? I'm trying to find a low compression, low cost 318 build with 350 ft-lbs torque below 3000 RPM as the OP requested, and am coming up blank.

I think one of the smaller Crane Powermax cams would be good. I would run what I call the "Crane magic cam" but some would say it's a bit big.