That is an outstanding car you are building. Mine is not going to be anywhere close to that. It will be a nice driver with pretty much stock suspension. I will take a look at the Muncie the next time I am up in the attic to see what the ratios are. You are pretty close on the 3,000 rpms at 70-75 mph. I think the ratio in my Olds is 3.42 and at 70 mph it is tacking about 3 grand.