Cam choice for low compression motorhome 440

I'm helping a friend with his 78 440 motorhome engine. This winter he has decided to do a cam swap. Since I have very little experience with 440's I though I'd seek advice from the group. He is looking for a nice boost in low to mid range torque, and would like a nice idle lope that isn't really choppy.

440
I think motorhome compression is 8.6:1
Factory intake
Thermoquad
Factory exhaust manifolds
Dual 2.25" exhaust
727 auto, stock covertor with shift kit.
3.23 gears
67 Sattelite

Looking for recommendations for hydraulic flat tappet cam to maximize a low compression engine.

This car is a daily driver in summer and often goes on road trips.

Thanks for the help FABO, and Merry Christmas everyone!!!!