1994 Ford E350

Vehicles that will maintain speed limits while towing and climbing are few and far between, even new ones if you read the road tests. As noted plan on going slower up hill. I towed our TT with an 89 F250 with the 351 engine. We passed a lot of vehicles and were passed by a lot particularly when going up hill. It had a tendency to run a little warm and I found out it had some dirty injectors in it. Replaced them and it ran better. Went to performance wires and ignition system (Mallory) and it really ran well. Actually could have gone to larger injectors once the ignition system was installed. High heat issues are not always due to radiator cooling but other things that cause excess heat such as lean running injectors. Never did have a pinging issue. You might also want to consider a lower temp Tstat. I also had the 4:10 gears in the truck very seldom used 1st gear all starts in 2d except when towing.