Hi All, So 69Racer's plan, luckily for me, worked fine. Taking off the wheel. blocking up the front end, and diddling with the jack under the lower control arm worked the upper CA into a mostly centered position. Loosening the other bolt on the shaft gave me some room to use multiple length 3/8-24 bolts to draw in a little at a time until I could finish with the real bolt, lock washer, and cap washer. A little dab of red loctite and torqued both back to 35ftlbs. Did the same to the other side. I'll be watching these bolts whenever I pop the hood from now on....
'68 400HO Coupe, 4 spd, 259 interior, Windward Blue. My other car's a Johnson 15 outboard on a '61 Starcraft rowboat... Just sayin'.