No, You don't want to put the yokes out of phase -- that was Chevy's crutch for a situation where the crank and pinion were not parallel. I would just drop a couple of plumb lines, one from the front/center of the crank pulley and one from the center of the transmission output shaft and make sure the line between them was at a true 90 degree angle to the rear axle (which means it is parallel to the pinion). If the crank and pinion are parallel, but offset laterally, that is not a problem as long as it is within the tolerence of the u-joint -- 2 degrees is no problem. If they are not parallel, I would investigate how to move the tailshaft left or right to correct the problem. This may not be your issue, but it is just one more thing to eliminate as the culprit.
Pappy
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