I appreciate all the comments. It seems the consensus is the make it as rigid as possible, but like I said this will be a car that goes to the track maybe twice a year. I personally like things looking as original as possible, yet I would be bored running 13's , 12's....

Any first hand experience with using the US Car Tool Connectors ?

My biggest concern is they are only 12 gauge, and the floorpan is probably less, so....

Do they really stiffen things up ?

What about additionally boxing the front and rear torque boxes, is that worth doing ?

And the front Radiator support stiffener ?

In theory it looks like a good idea, just wondering if anyone has first hand experience with these items.

It is an Original 6 bbl car, so the most I am willing to do is install the US Car Tool style connectors/parts, as they look somewhat factory, to me.

What brought this to mind is this video I saw of a 70 Bee running 10.60 with 1.56 60' times without a bar. This is the type of car that appeals to me.

https://www.youtube.com/watch?v=Pzc3yt9M21E&list=PLryldDmlkIM3zhPot22ErcCdMzCXDMWdz