You have assumed correctly, it's a 03 Ram 1500 as listed in my signature. I originally joined the group because you guys are ahead of the game with Stand alone tuning and transmission swaps. The 46RH/A518 is basically a 727 with a OD unit attached and is a half of an inch shorter than the 545RFE and I simply elongated the mounting holes a little and the stock Ram RCSB driveshaft can be used without modifying. The trans bolts to the block and a 05 manual trans starter is needed along with something like the PATC special conversion flexplate. Any of the three speed shifter work, leaving only the TV cable to be fabricated. I bought a LOKAR TV cable and 10 feet of motorcycle clutch cable from eBay and fab'd the TV cable. Very easy swap. And the Ram cross member would be a good item to use with most any swap I would think. Good luck..
