According to the MOPAR engine book the RV cam P4452755 (duration 240/248 - lift .405/410}. This was the cam that produced the most torque from 318 and 360 engines
this is the CAM to get / its the 30.000 Lbs RV
this cam turns a 318 into a tire burning [ 35 boggers with 3,21 gears] Monster
this is the CAM they put in a 318 crew cab 1 ton dually dump truck hauling a D5 dozer on a 10 ton beaver tail trailer with 5 tons of dirt in the bed go,in straight up a 5000 foot mountain / it,ll make it there just not real fast
NOTE this CAM is absolutely available as of this date 12/15/2011 - just do a google search with the part number above