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Does anyone know the specs for the front end alignment for a 1928 526 5 pax sedan?

No doubt you've already browsed the owner's manual, the only thing I see mentioned there is toe in of 1/8". I'll scout around some non-Packard industry reference books to see if I can find more specifics.

I hope you can read the table, the original is very small print. I have used this for three 1920's Packards and they all required significant correction. In each case I took the axle to a heavy truck repair facility and they set the king pin inclination relative to the spring pad bases. On one of the cars I attempted to check the set up at home and decided it was OK. That car never tracked well, needing constant minor correction to keep it straight on a good road. I removed the axle, had it checked and it was out of spec. After resetting the car tracked perfectly.

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What you want is the May 15, 1928 Packard Service Letter (Vol. 2, No. 10).? The feature article is entitled "Front Wheel & Axle Alignment" and covers all needed specs (including caster, camber, toe-in, etc.) for 526/533 and earlier models.? I've requested a copy from a private collection but am leaving for some sunnier climes for a week; if you still need it when I get back I'll get you the info.

PS - from the Service Letter:

--? Toe-In - 1/8 inch
--? Caster - 1 degree
--? King Pin Inclination - 8 1/2 degrees
--? Camber - 1 1/2 degrees