1974 javelin power brake unit reman

I got one from NAPA and it was exact replacement.

I bought one that was supposed to fit my 68 Rogue from Rock Auto but it was actually one that matched a 73 Javelin unit I had in my parts. It was the start of a painful now discontinued relationship with Rock. They do not want to take back parts that are wrong and will not pay shipping back if they do take it back. If their vendor says it fits, that is the end of the story. Only mentioned this because you cannot always rely on the seller to send you the right part.

The problem is suppliers "condense" part numbers -- they do a bit of parts book research and determine how many applications one part should fit, then change the numbers. On less known cars like our AMCs they make more mistakes. The sellers are supposed to report errors, and the supplier supposed to make changes as returns are made (let customers error check... like Microsoft...), but it often just doesn't happen on low volume parts. Some of use make mods to make things fit also, so maybe they don't get enough returns to make it worth changing their books? Even when they do make the changes, it may be 2-3 years before the changes get pushed out. In this day of computers you'd think they could do it faster, but a supplier has to change theirs first, then the store has to change their data base at hundreds of stores...  for a part they sell a dozen of (across all states and hundreds of stores) a year. Not exactly a priority...

Thanks they ordered a 3rd one and it was exact match to one on car.
1 out of 3..... just happy it fit and was 100% match.

Yes, it CAN be done, but most of the big suppliers aren't that responsive. Kudos to Tanks for doing us right!!