I think 700 HP is going to detonate your bottom end... you can try a stud girdle that may be some insurance. It might stay together with only an occasional blast down the hwy but won't last under any serious boost over 7-8 lbs. Mopar cranks are strong but they have their limits.

My 13.5-1 SBM has been o-ringed. Used Fel-pro gaskets.

Big end width is not a big concern to me. A bit narrower won't hurt anything. Stock rods will last at 6500 rpm's. My oval track motor tossed a rod when the former driver ran it with thick oil and no engine warm-up...

You can bush the small end of a stock rod... finding a shop that will work on this may be a little tuff... so many only want to do belly button engines and are afraid to bend the rules.