If I restore my 40 to stock, rims and all, what kinda stuff could I tackle off road? I don't plan to go rock crawling or anything, just a easy trail to our camping spot. A 1990 Ford Ranger with 4x4 takes it in stride with only a minor spot for potential driveshaft scraping that can be bypassed by driving a little on the side. Whats the redline on the F155 motor? Also, how are the experiences of the ManitAintFree 6 in 1 headers and 3 in 2 headers? Do they add any substantial horsepower? Does it decrease ground clearance? Also, I have the PTO winch, and I want to know if interfeer with the PTO shaft. Are there any other headers avalible for a 73' 40? Ah, how hard is it to rebuild a carb?