BUILD-OFF CHALLENGE: Tygaboy's '75 LS3, It seemed a good idea at the time... Options

[tygaboy]

Hi World!
Let the games begin! (IMG:style_emoticons/default/piratenanner.gif)
As the title says, it's a '75 that's getting an LS3 (Cracker's "old" motor - thanks Tony!) and Boxster 6 speed.
Also planned is zippidy doo-dah 911 front suspension with Boxster calipers all around. The rear suspension is getting 911 ebrakes, Tangerine Racing raised pickups and shock towers.
I have plans to stiffen the chassis with a partial cage.

Doesn't that sound like a great plan? I think so, too!

BACKGROUND:
I got this as a roller that was purported to be "dry and accident free". And it was!
Except for all the rust and the place where it was hit. Yeah, yeah... But it's all good. The seller and I worked everything out. (IMG:style_emoticons/default/beerchug.gif)

But our little 914s are full of surprises and isn't that half the fun? So, first up is rust repair time! (IMG:style_emoticons/default/sawzall-smiley.gif) (IMG:style_emoticons/default/sawzall-smiley.gif) (IMG:style_emoticons/default/welder.gif) (IMG:style_emoticons/default/welder.gif)

Let's begin with some pics of what I started with. Wish me luck! Wait, forget the luck, wish me SKILL!!!

[tygaboy]

CHASSIS STIFFENING: Lower Firewall

Today's realization is that this really is a jigsaw puzzle. And I've determined I want to have all the pieces before I start putting any of it together.

So... My stiffening plan includes a tunnel from the firewall to the front roll hoop. Since this will tie into the lower firewall and it's all the way out, this is an opportunity to beef up that area of the chassis, too.

I was planning to run a bar across from long to long and sandwich that between the stock inner and outer firewall sheet metal. But with some additional head scratching and input from my race car fab buddy, Martin, I've decided to build a more substantial structure. Similar to what MichiganMat has done on his build.

If you haven't figured it out yet, I love curves. Arches are pretty strong, too.
Roll bender to the rescue! This is a different one from the one I used to roll the round tube. It's purpose build for flat/square stock. I got it for free and it saves me buying additional dies for the Swag Offroad roll bender.

So instead of running a straight tube across and running sheetmetal from the upper firewall down to the tube, I'm going to roll a square tube that fits right up against that curved lower edge.

First, I used the curve template tool to capture the radius I need. I was surprised at just how much arch there is.