Umm ok I'll bite, What exactly is wrong with the stock cam for wheeling?..
he wants to wheel it ..which doesnt work well with it lumpty lumping all over the place.. and where in hell would you use 7500 rpm in a trail rig? if the powerband doesnt "hit" until 2500 rpm then what good is it on the trail? you need power on the bottom 1000 rpm to 5500 it's easy enough to break ujoints, axles etc with out compounding the problem with having to rev the snot out of it and "Launch" over every obstacle. unless you want to run a stout automatic and high stall converter that kind of motor is useless off road.
I think the point you are missing here is there are two numbers.. torque and HP torque is what is wanted in a trail rig. and you dont get that with long duration big overlap cams.
Seriously, the tool for the job, you dont drive nails with a screwdriver
And finally it really isnt a sin to not build every engine to the utmost limits of durability and sanity..I will bet that for the most part with proper gearing and all other things being equal a 258 six would go places that a 500 horse lumpty lump couldnt (in the same vehicle).
Sorry for the rant and it's not personal..