CFR Firewall Shifter Bushing, Fasteners Options

[TargaToy]

I'm installing Chris Foley's firewall bushing which is a beautiful design.

Has anybody installed one using fasteners other than the sheet metal screws or pop rivets that came with the kit?

I've been contemplating installing #10-24 riv-nuts after reading someone else's experience with either the screws or the rivets (I can't remember which) working loose over time.

What's your experience?

[TargaToy]

Here's a little follow-up.

Picked up a large washer with an ID of 1.25" (give or take). With just a little filing, it fit over the shift rod flange on the inside of the tunnel.






I ended up opening up the holes in the CFR housing to accept 6mm bolts and then used it as a guide to drill the same pattern on the large washer. Tacked the 6mm nuts. On another go-round, I would find a thinner gage washer or cut one myself out of thinner steel. At 1/8" thick, I had to have the heat set so high on my welder that I had to be very careful not to liquify the nuts.




And here's the final product installed in the car. Ended up going with button head allens for a cleaner look. I will note that I used 30mm length bolts but will likely be replacing these with 45mm as I didn't get as much squish as I expected and would like the bolts to run through the backer nuts completely (vs. just flush).

[913B]

Here's a little follow-up.

Picked up a large washer with an ID of 1.25" (give or take). With just a little filing, it fit over the shift rod flange on the inside of the tunnel.






I ended up opening up the holes in the CFR housing to accept 6mm bolts and then used it as a guide to drill the same pattern on the large washer. Tacked the 6mm nuts. On another go-round, I would find a thinner gage washer or cut one myself out of thinner steel. At 1/8" thick, I had to have the heat set so high on my welder that I had to be very careful not to liquify the nuts.




And here's the final product installed in the car. Ended up going with button head allens for a cleaner look. I will note that I used 30mm length bolts but will likely be replacing these with 45mm as I didn't get as much squish as I expected and would like the bolts to run through the backer nuts completely (vs. just flush).

How hard is it to place the washer inside the tunnel?
Did you have enlarge the access hole or something.
I would buy one of those washers with welded nuts from you.