440 rebuild questions

I have a 75 440 out of a motor home. I am doing a cheap rebuild but have a couple questions. The motor has low miles, everything inside looks really good except #8 cylinder was seized from sitting for a long time. My plans are to hone the cylinders, get new rings, bearings, cam, and gasket set. I would like to get as much low end torque as possible because it is going in my wood hauling truck. The heads are 452 castings. First question, should I do a mild porting on the heads or is it a waste of time? Second question, what cam should I go with? The truck is a 1977 D250 4x4, 727 tranny, 3.55 gears. I know it isn't going to be a huge gain in torque by just doing this rebuild but I would like to get whatever I can out of it.