Hey Nukes, if your frame rails are good, the car will handle quite a bit of power. There is a weak link fix for the R200 that makes it pretty tuff, there is much info on it here but it pertains to welding the spider gear pin in place. Search for it or pm me and I can give you more info. I just got thru replacing mine.
I'm with you on the tunnel ram, they sure look cool, see my avatar.
I'm just north of Houston, if you want to check anything out first hand just make the drive and you can look over mine.
Jeff