Purchasing a new 2013 RAM, went to the dealer to look at the hitch in anticipation of purchasing a Torklift Super Hitch....I've helped my buddy install one on his FORD, they are bolt on units. Remove...
You're right, the factory hitch attaches to a welded into the frame cross-member. I got around this problem by installing a Curt Bolt-on commercial hitch (# C-15800; 2.5" - $285) good for a whopping 2,700lbs...Hitch bolts right on to stock Dodge frame rails (beneath stock hitch) without drilling. I'll PM you...