402 BB question

[Griz1055]

Howdy, I posted this on the main page in "engines" but haven't gotten a response. New poster, but have been reading since August. I bought a '69 4x4 last year to fix up and pull my camper. It has a nice 350, but getting up there in miles (100k). I have a newly built 402 sitting in the garage I can have if I want to keep it. I would like BB torque and power, but this engine has closed port heads and high comp pistons. I read that it is built to run all out, all the time (racing?) Just wondering if it would be a good camper puller and occasional street cruiser and mountain expolorer or is it too hi performance for what I want? Also, would I need to run above 91 octane with this set up? Here are the specs I have for it:

Melling Performance cam (22204)
cam lift .296 int .311 exh
valve lift .503 int .529 exh
L35 oval closed chamber heads 400 hp
SRP-BB high performance high compression forged pistons
Casting # 3969854
Chevy Racing manifold

Thanks! Brent