69 barracuda dash to firewall bolts

I wonder if put in from the bottom would they hit and break the windshield? Cause someone else said that might happen?

Given that there’s more than 3/4” between that location and the windshield I kinda doubt it. The ideal length is about 5/8? So knock the pointy end off the stock bolts and you’re there.

Or buy the other style clips without the raised threaded section and maybe you can get away with a 1/2” long bolt, which should be standard at the hardware store. Just like the U-clips without the tall threaded section…