Here are the Peeron/Bricklink references : rear wheel = 1 wheel 6014b (normaly used with tire 6015) + 2 tyres 50945 (normaly used with wheel 50944px1); front wheel = wheel 4624 + tire 3641 that I made smaller with a stationary belt sander (7b tire can be used too but is bigger)
That's absolutely PERFECT!!! My very favorite part is your choice of wheel sizes. And also, the body is just like the real ones! The red seats add a little excitement. I don't think it would be too much to ask for instructions? Anyway, great job!