90 may not be a good temp for those guys. I've brought mine down to 76deg. The fish seem much more happy now. When my temp was up the shark wouldn't move much, It would just sit on the bottom panting like a dog. If you could get your hands on a chiller, that would be great.
As for the dodge/ vette. I had a 76 stingray L88, but had to give it up. Now I'm modding a 96 indy pace truck. i've installed a 6-71 blown 502, 400t, gear vendors. Since i miss the vette so much i'm going to put the vette tail lights in the tail gate and build a 50 style vette dash. The avitar is the actual hood emblem i had custon made to fit where the old 96 dodge ram went on the hood.
This truck may get all the room left in the garage, and the cougar will get left out in the rain.