This WLD is new to me. I traded a '58 basket case for it. I know pans and shovels and XL's but have never owned a 45 flathead with a 3spd trans. Assuming I'm on level ground, at what speed should I be shifting from 1st to 2nd? How fast can I go before I shift to 3rd? I know I can't run at high speed without backing off the throttle often to splash oil up into the cylinders and pistons. Just how fast can I expect to go and/or cruise in 3rd comfortably, without hurting anything? How slow can I go in 3rd and 2nd before shifting down?