IMHO, A/Sedan cars are not the same as A/Prod, B/Prod or T/A cars to most vintage race guys...and a 1968 car converted in 1972 makes it tough to get into some venues where they are picky about "historical significance"
A buddy that I race with has a 1968 Camaro with real Trans Am history, race car since new, turn-key as it sits (he is still racing it) albeit in need of a proper resto. Been asking $125k and no takers. To restore the A/S car on eBay would take you at least the $125k and you won't have the history. Heck, even to make it race ready may take 75k, depending on how close to the front you want to finish
Unfortunately, vintage racing has become a $erious bu$$ine$$ and lots of BSD's throwing their checkbooks around to mask a lack of any true ability
Oh, wait, did I just say that?
Regardless, the red Camaro is cool - great way to go racing if you don't care about doing Monterey and you can do the work yourself. Really cool that Sig is still around and could offer tips!
Colin