I'm running the stock 3:73 rear end in the van. Normally here in So Cal I run 55-60 with my trailer. CHP here is more concerned about the guys pulling the Seadoo trailers doing 80 in the fast lane with them. I moved heavy construction equipment for 12 years so I sometimes forget that I even have the trailer on the van at times...lol Nothing like going down the Grapevine here though at 200,000+ lbs though like I used to.

 

There is nothing wrong with OHC. The problem is when you take an engine in a mustang and put it in a truck. The 4.6 did great in the mustang I had, but I am not all that impressed with it in a truck either. It is not a good match.