UPDATE:
Worked a bit more on the roof today, I got in with the top removable bit of the roof fine and it does have a solid underneath too, just not detailed at all. I'm still undecided on whether I want to go ahead with an interior yet, I may just do some basic seats and a steering wheel and have slightly darker windows .
Anyway here's some shots of what I got up to, Roof, bit of the interior roof, and then the Emblems that i did the other day, i think they came out pretty well
For the rear 'corvette' one i used Mangal font and just stretched it and moved it about until it looked right, but for the 'stingray' and '454' emblems i just used a standard font with a load of tweaking on it in spline stage, the stingray one was obviously the most work...
Im going to try and get the model stage fully complete by this weekend so ill push it this week to get it done soon
So here's the shots of the roof, Tsplit, and the emblems: