Brake brace install ?; how to remove stock lower MC bolt

[GoldHawg]

I'm getting ready to install the brake brace to protect against firewall cracking on my 69 and I need to remove the stock lower bolt as the brace includes this. I tried turning the head from the inside to no avail. I think I have to rap it hard with a hammer on the engine side to drive it out, but given the concern was the flimsiness of the brake pocket metal I was reluctant to do that w/o checking with others that have done the install (I didn't have any instructions w/mine and have not been able to find w/search). How did others remove that stock bolt?

[DAC21]

I'm pretty sure the bolt is knurled. You will probably need to tap it out from the engine bay. Maybe use a wood dowel and hammer?

[rwmann]

Only semi-joking, this is the precautionary firewall panel brace/reinforcement that’s not needed until you crack the firewall panel trying to get the MC out to install it…

[david premo]

Put the nut on the bolt you are trying to get out, it will give you a good grip point for your drift punch and hit it. On all the firewalls there is a second piece of metal that is the part inside the firewall that is always intact and is extremely unlikely to break. So just strike the bolt with the nut a few turns on and it will pop out inside, the nut just helps to keep the punch from glancing off.
Dave

[GoldHawg]

Put the nut on the bolt you are trying to get out, it will give you a good grip point for your drift punch and hit it. On all the firewalls there is a second piece of metal that is the part inside the firewall that is always intact and is extremely unlikely to break. So just strike the bolt with the nut a few turns on and it will pop out inside, the nut just helps to keep the punch from glancing off.
Dave

Hit once, hit twice and then out. Thanks.