Every one of us builders who has been building a long time could probably come up with a list a mile long,but here's a few<no particular order>:
1>make sure that every tire pictured with white lettering or whitewalls has them already on them.
2>only one piece oil pans-not molded into block
3>no molded in exhausts on anything
4>more decals for nameplates or dash guages-etc..
thanks guys