Thread: 4-bar?

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Thanks to several experts. My son was able to help me since my arms are not long enough to measure both ends of the car. Well it was really out of line by almost 1 1/2 inches just using the length of the bars out of the box! Anyway we got the king pins triangulated exactly on the midpoint of the rear of the frame with the frame jacked up so the the flat part in the middle was level with a carpenters level. However the rear gave us fits but we finally got it so that the wheel base is within 1/32" equal on both sides and by the distance from the opposite king pin. It will still have to be aligned with one of those laser rigs, but we could only get within one turn on the threads of the four bar rods, so maybe it is as close as you can get? Anyway we will not drag a tire sideways on the way to the alignment shop! And (!) now the rear panhard bar is much more nearly parallel to the rear axle. Thanks very much for the procedure and the drawing. We did get the pinion aimed slightly up but it could be 3-5 degrees. We measured the Brookville frame several ways and it is really straight so I guess the problem is in the spring mounts and maybe that the brackets we welded on the rear axle are a little out of position, but anyway the adjustments are all within the thread length of the 4-bars. As Streets said the drive shaft will be pretty short so there would be little weight saving with an aluminum driveshaft and I learned from Richard that I can send for one made to order. Henry and Richard explained the need for slack in the splined part of the yoke. I will check into the National U-joints Streets suggested. Thus in one afternoon we got it lined up "in the ballpark" with a lot of help from several of you!

Don Shillady
Retired Scientist/teen rodder