Just my
What kills the Coronet for me are the stupid large wheels and air dam front. I don't know how much the 'owner' influenced this but if they had gone more subtle like their previous GTO, I think it would have made a huge (pardon the pun) difference. The air dam strikes me as if they ran out of time and/or ideas. The tires just because they could. I'm thinking like an 'updated' R/T would have been cool.
As for the Pantera, I'll have to watch the episode again. I really liked it, and agree with the OP it's MUCH better than the Coronet.
And what's with the LS talk? If anything, Kindigit is one of the few shops that DOESN'T LS swap everything.