I have a "67 Barracuda and the original Wiper motor is toast. After reading a number of post here on FABO about re-clocking wiper motors, I bought a wiper motor that's for a B-body and rebuilt. The problem is the 3-speed crank arms have changed thru the years and the '67 arm has a larger hole and for a concentric motor. The new motor uses a non-concentric arm with a smaller hole. From what I have found next generation of arms are part #'s 2822272 and 3431618 and are made for non-concentric motors. The Has any made this conversion using ether one of these two arms using the '67 style linkage? I realize i would also need the plastic bushing that works with the newer arm, the diameter of the hole in the '67 linkage is approxamatly 3/4". Thanks.