Engine Rebuild Question- Cam Options

[5Tractorguy]

Well, the engine in my '88 V30 finally went a couple weeks back.
I found a replacement 350 from an '80 C30 that was "freshened up" in the early 90's and then left in a cellar. I'm going to have it fully rebuilt before it goes in the truck.

My main question is about the cam. I move a lot of equipment, that truck usually pulls an 18ft trailer or has the bed loaded with tractors/parts.

Both my '77 K25 and '79 C30 have some kind of towing or RV cam that the previous owners installed and seem to do just fine.

Would the same generic towing cam be best for this truck as well? I'm completely oblivious when it comes to this which is why I ask. At this point, given the rebuild is going to cost around 3K, figured it may be neat to put something in a step above an RV cam to get some lope out of it, but I don't know how much that effects mileage/performance.

Any ideas?