This is my first flathead. Runs like a sewing machine. suppose to have 10,000 miles on a rebuild. Any info I should know about the flathead to keep it running smooth would be appreciate the advice. (weight of oil, kind of gas, ect.) The Car has some rot on the floorboads and front fenders, a little above the rear splash but seems like straight forward metal work to me. Let me know what you guys think.