QUOTE(RustyWa @ Apr 14 2007, 03:41 PM)
QUOTE(Bartlett 914 @ Apr 14 2007, 07:20 AM)
The original is 20 gage. It is welded on the outside. I made mine from 16 gage. I made a tool to form the flange on the through hole. I made threaded bosses and welded them in place.
Those are nice! Do you still need to make that little notch on the tank side with you system?
No!
I have the car stripped but I think these can be installed with the tank in place. I use a template and center punch 4 spots. The large one is 1.25" (IIRC). I used a hole saw. The other 3 are drilled using a step drill. I welded it in place through several small holes and some welds on the outside. It is nearly exactly how Porsche did it only theirs was pretty and 20 gage instead of 16.