What disk brake upgrade for a 74 duster, not Wilwood

Oh I get a fair amount of arguing about my products from "old time Mopar guys". They tell me that "nobody needs a fancy timing cover", or "nobody needs to upgrade their alternator", Or "we never needed parts like that when I was driving my 440 dual carb Hemi back in the day". I hear it all the time, especially at swap meets or the track.

I don't usually pay much attention but if I have a slow moving product that people really ***** about then I just kill the product. The motor dollies were one product that I killed due to people constantly whining about them. I thought the dollies were a cool product. I used them all the time and everyone I know who bought dollies from me liked them and used them. But they were almost impossible to sell at swap meets or shows. People would say they just use an old tire to haul their spare motor or "all it takes is an old 2x4 to make a stand".

I had one guy tell me that he just stole a shopping cart from the grocery store to use as an engine dolly so he wasn't going to buy an engine dolly from me.