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Old 06-07-2014, 07:19 PM   #18
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Join Date: Jan 2007
Location: Tucson
Posts: 2,183
Re: Firewall holes for Vintage Air

Originally Posted by elf w/capital T View Post
I havent purchased the kit yet for my 68, but I smoothed my firewall and I want to prepare the holes now, before i paint it... anyone know which size holes I'll need for the grommets?? I'm not using the plastic cover thing if you are lost.

any help would be appreciated!
I used the vertical arrangement of fittings to make routing the lines up the inside of the fender easier.
In the photo he small line is 6 AN or 9/16 - 18 and the large ones are 8 AN or 3/4-16. You'll need a step drill to get the next size up for clearance for the threads which are the same on both sides of the bulkhead fitting I used..
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