One random tip a parts store guy gave me a long time ago. Run a windshield wiper that is just one size shorter than stock and the motor does a much much better job of moving it around. It made a pretty big difference on my 73 W200 compared to the stock length.

-Jon

70 challenger convertible. 340/5 speed. blown, intercooled, efi, blah blah blah 71 valiant scamp 318/A833OD/AC/PS 00 dakota RC 4.7L 5 spd autoX'r. SRT10/T56 swap in process 73 W200 Power wagon, PTO winch, 4 spd