1. You do not say what year your motor is. ALWAYS provide that info.
2. The part number you gave IS NOT a Classic Trucks part number. Not saying you didn't get it from them.
3. The part is sold by many many many vendors, Ebay, Rockauto, etc. $75.
4. The part is made in China. A Delco reman would be a good idea.
5. Most of us have had good luck with Classic Truck Parts. Classic has two distributors for 292. years 63-70 and 71-74. Many of us do not use Classic Trucks for parts like that. Dizzy's can be purchased everywhere. At a local place where you can walk in a get a refund.
6. They have a no questions asked refund within 30 days. Even though they say electrical parts are excluded, you could have explained it's not an electrical issue and 90% of a distributor is mechanical. But you have past the window so your gripe rights against them are void.