First, two nice cars. awesome. If the ohc 6 engine needs work or parts then that should be done sooner rather than later. Cams, fuel pumps, timing belts not to mention many other parts are in short supply. As for the third gen my own opinion is that the third gen cars are the next ones to take the big jump in value. A few years ago you could buy all but the very nicest 2nd gen cars for less than $10,000, now good luck with that. I think your GTA is an excellent investment that would be a shame to sell just before the value goes way up. Again just my opinion which might not mean much. Neill