If your 250 doesn't have AC, then that second 8 amp fuse probably won't do anything but occupy space.

My 250 transmission always starts out in first then quickly shifts to second. I don't remember how it shifted before I had the trans overhauled, 9 years ago. I've heard there's a modification that can make the trans shift through all the gears. I also have a 1972 250C that I'm putting back on the road soon. I'll see how that one shifts.

Does your trans delay all upshifts or just 2 to 3? There is a shift control rod connected to the accelerator linkage that can be adjusted but it affects all upshifts. On these cars even ignition timing adjustments can affect the shift points.

Happy Motoring, Mark

__________________
DrDKW