Sure Bryan, I'll need a couple things. The firewall layout, the distance you want from firewall to spinner/prop hub. Engine [13B or 20B] mount style, rad style & size, picture is great also. The more info and detail the better. One thing that I don't have but would like is the overall length of both a 13B and a 20B just to make sure the model I'm using is to scale.

Jarrett