Some help with a 400

Hey guys, I've not posted here in a while, but I have a question I think you can help me with.

I'm looking at building a 400 I have and I'll go ahead and say it's not going into an A body, a C body is the target for this one, so, my question might be a bit unique in this circumstance. Have no fear, however, my A body will get a small block and that's a work in progress.

My question is, lots of guys build these for horsepower, what about torque? The obvious answer is a stroker, but I'm not in stroker money territory. I'm in the new pistons/top end territory. This is a industrial engine I believe(motorhome? I have no idea I haven't actually looked at it in years) I was thinking something like the kb 1274 or the 240 piston(recommended by Hot Rod, who built a 400 I'm basing this on), the Edelbrock E streets (84 cc, 2.10 intake, 1.81 exhaust), and maybe something around this:
COMP Cams Thumpr Hydraulic Flat Tappet Cam and Lifter Kits K21-601-5
for a cam selection, puts my usable rpm range right around cruising speed on the highway. I'll probably use a performer rpm intake because everyone else does. It must run on pump gas and I'm not looking for ridiculous compression, a street engine that could pull if it needed to, really. If I like it in a C, I would probably put the same thing in an A, in the future of course.

It's not technically an A but for those of us that like torque, what do you guys think of this combination? I'm still a bit new to big blocks, and to engine building in general, so bear this in mind before you flame me.