Thanks Belair62. Trust me guys, I don't have much tolerance either when it comes to bogus claims and tall tales based on word of mouth or someone's memory going back 20+ years. There is some paperwork here, so like Rick asked, just keep an open mind 'til he gets his scans up. Healthy skepticism is good, rigid denial keeps the hobby from advancing.
As far as substantiating the claim further, here's a great opportunity to take advantage of the power of the internet and recruit someone in the Detroit area (Trenton is less than 10 mi. outside of the Detroit metro area) who is willing to head to their local library and dig through some microfilm of 1970-era Detroit newspapers to see if any ads can be found for Ray Ridge Chevy. Also, its probably likely that some of the former dealership employees are still in the area, and they could help substantiate this as well. How about a dragstrip in the Trenton area?
Think about this - how many other potential new discoveries are we missing out on because someone is immediately considered full of sh!t and their story dismissed simply because it doesn't fit in with what we already know? Again, all I'm encouraging is healthy skepticism and an open mind. OK, I'm off my soapbox now