I'll answer some questions here. The tires do hold air, no leaks. I think they would work alright for racing. There is a fairly heavy vibration at free-way speeds.
I don't want to set a price, so make an offer.
get the supercharged engine that Nate found, and have either dave or Scott do it. As I recall, Scott used to have engine swaps listed in his sig. If you're gonig to sell it, who cares about a warranty?
Do you really think an LS1 is going to be any cheaoer to mod? HA!
Also, if you do sell your stang and get an F-body It's still going to be sitting around until you find someone to install your go-fast parts and tune it for you. It's not magically going to jump together in a weekend.