I have another question. How much engine braking can I expect? I have a completely rebuilt 261c.i. with the Muncie sm420, 2 speed axle. Coming down off the mountain there's a couple pretty steep sections, probably 8 or 9 % grade. My first trip down I plan on having one hand on the steering wheel and the other on the door handle. Lol I may do a lighter load the first time just to make sure I don't lose the brakes, take a few breaks to let the brakes cool. Another question, how many miles or hours break in on the engine? I'm using a high quality break-in oil plus zinc. I know the old rule of thumb was 500 miles but with the new synthetic oils can I get away with a shorter period? Can part of the break-in be idling?
