Got a buddy with a 11 1/2 ton ram with a 5.7 and mds. He had a roller on a lifter go bad that also took out the cam. Just looking at some options, He is looking at maybe a 6.4 bge cam and get rid of the mds or another 5.7 cam and no mds. Wondering what all involved in the swap for a 6.4 cam or the 5.7 non mds cam, and where a good place is to buy the parts.