Yes the street driving kills alot of cars. Testing is everything as you know. I tried running the blower a little too fast. The engine didnt like it. The temp started running up to 185. A quick pulley swap fot less over drive brought them back in line. The engine temp is critical to maintaining the correct clearences inside the engine. As the temp goes up the rod and main clearances increase. This puts more strain on the oiling system. The deck height also increases changing the push rod adjustment. The upper pulley may need another step down after the trailer is hooked up. Time and testing will tell. As a dog owner I'm sorry to hear of Jim's dog of many years passing away.