New Camshaft, need more torque

[1972GMCsierra4x4]

I'm wanting to put a different cam in my truck. I'm needing more low end torque for pulling trailers. Was wanting to hear some of the aftermarket cams that everyone out there has in their trucks. I would like to install something a touch lumper than stock, not huge just enough to notice. Also, the engine I'm running is basically a stock 1971 350 truck motor with an edelbrock 600cfm carb and an edelbrock performer intake.
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