Hey Ron

Sorry for the slow reply!

1. Top of fuse from cockpit dash panel to the firewall. = 6 9/16"

2. Bottom of fuse from the wing opening to the bottom of the firewall. = Left Side 5 5/16" , Right Side 5 3/16" as the fire wall has built in 2 deg. of right thrust.

3. Width and Height of the firewall. = 3 1/2" X 4 3/4"


Again sorry for not getting back sooner. With the holidays and my oldest son about to graduate early in two weeks things are crazy right now, but if you need any other info/pictures just ask and i'll try and get them to you as soon as possible.
best of luck with this project!!