Mr Bill
Old Dog
For gen II Penske shocks, they use the stock bolt with the shoulder on it.I believe that the Penske shock is different than the Wilbers in that the hole on the right side is larger in diameter than the right side (just like it is on the stock shock) so the Penske Shock does use the OE bolt. At least, as far as I can remember, it did for mine.
I don't think is is possible to put the STOCK bolt in wrong and get the nut started. I could be wrong.
Gen 1 looks just like that and you can't thread the nut if you put it in wrong. Thanks Mr Auburn!
Is this the lube you use? Looks like it would work on the axle around the wheel bearings too.