Shane, even without adjusting the wheelbase, you did a very credible job on that.
I would suggest adding some door-handles. The Revell mid-60s A-bodies (1965 Chevelle, '66 ElCam, Chevelle, GTO) have nice separately-molded ones, and the '66 Chevelle is a wagon, so you'd have four of them.
If you ever decide to try it again with the wheelbase strecth, you've already demonstrated that you can do a very credible job with this, and I'll look forward to seeing that if you give it a go.
Charlie Larkin