There have been some interchangeable parts manuals on ebay lately. I have never seen one or used one in but need to find parts for a '20's Hupmobile
Any advise on whether they are a useful as a resource or just a waste of money?
Quite useful IF your car is an" assembled" car using components from outside manufacturers, eg: Continental engine, Timken axles, Muncie transmission. Hardly useful at all if Hupmobile made most or all of the car themselves and did not sell components to others.
Today they are useful to someone parting out a car (remains) as they can advertise what the parts fit and expand the sales possibilities.
They are also useful for GM cars. Many parts are interchangeable from Chev. thru Cadillac.
I have the interchange for my 1930 Plymouth but most of the cars it shared parts with are even rarer so it is not much help to know that the rear axle bearing is also used on Erskines and Roosevelts!
Reprints of the 1920s to 1948 Hollander Interchange Manual is listed on their web site for $47 at: https://hollanderinterchange.net/catalog/product_info.php?cPath=21&products_id=2 8&osCsid=0eb05c32940b8925dd0f920a9feb3c5d . Before you order it – be sure that it covers the Hupmobile year you have. The 16 edition reprint I have only goes back to 1925 Hupmobile in a few areas and usually only back to 1930. The one they are offering might or might not go further back.
From a quick glance at the 1930 Hup items, in my 16th reprint edition it appears they had their own engines and transmissions during that time. But it can still be helpful to let you know what year range parts interchange. And other items like the carb fit a few additional cars.
I think your best source of information will probably be the Hupmobile Club see: http://clubs.hemmings.com/hupmobile/ . Also the Horseless Carriage Foundation Inc. as well as the AACA Library may have some literature on your year and model of Hupmobile.
Hap l9l5 cut off
Thanks everyone. It is a '26 A. They made their own motors etc. I need a set of rings and wanted to find what other cars had the same bore (3 and 1/8 inch)
Also crossover on bearings, uni joint etc.
This the ebay item number. It won't let me copy the link with my ipad