Installing an LS1 booster and MC into a 68 - pics within!
 

I know the photos are with the car apart, but you get the idea. The booster will fit, I've seen it done before. I thought I'd post up some photos of the process and how I did it all.

I first took the old master cylinder off and removed all the pedals. I imagine you could do it without removing the pedals, but it would make it a lot easier and it isn't hard to do, plus you can replace the bushings and crap while you are at it. I replaced everything in the pedals and powdercoated them and installed Modo pedal covers.

The first thing I did was take the LS1 booster and made a template for the opening needed.
http://i97.photobucket.com/albums/l2...o/IMG_6150.jpg

After this I set the booster in the firewall and set the template, then traced out the opening and cut the hole needed.
http://i97.photobucket.com/albums/l2...o/IMG_6149.jpg
And then test fit the booster:
http://i97.photobucket.com/albums/l2...o/IMG_6151.jpg

After this I took the brake pedal bracket and removed the studs for the old master cylinder. I decided to use the studs on the LS1 booster instead. I have heard they fit perfectly, but on the car I am building it was a little tight, so I had to grind the holes a little to make it work. Be sure you test fit everything before you get too far into it! You can see them removed in this photo of the bracket.
http://i97.photobucket.com/albums/l2...amaro/12-1.jpg

What I did next was weld in some metal to fill in the top part of the hole for the old master cylinder. Then I reused the template and cut the new metal to the correct hole.
http://i97.photobucket.com/albums/l2...o/IMG_6286.jpg

After this, I reinstalled the pedals and installed the LS1 booster on the firewall. The LS1 booster has an eye hole connection to the pedals, where the 1st gen has a u-shaped bracket that screws into a solid rod. I installed the rod and bracket on the pedals and then measured the length needed to put the two together.

I then cut the eye hole off of the LS1 booster and trimmed the threaded rod to the length I measured. Then I put some wet rags around the LS1 booster shaft and welded the rod onto the end of the booster shaft.
http://i97.photobucket.com/albums/l2...o/IMG_6285.jpg

Now you can install it all back on the car with the pedals and you're ready to go! I'll try and get them installed and get some underdash photos tonight. It wasn't hard at all, and it will go well with my LS1 brakes on all 4-corners.

Hope this helps someone!

cool.

Thanks for sharing.

Yes it does!!!!:thumbsup:

I'll do a similar write-up for installing the T56 master cylinder once I get the parts in.

Been there done that. Worth it though
http://memimage.cardomain.net/member...80_85_full.jpg

Oh, one thing I found. If you are running a T56, the S&P or ATS master cylinder brackets will NOT work with the LS1 booster. You have to modify them the same way I did the firewall.

I have designed a bracket to work with the LS1 booster, so as soon as I have it machined and try it out, I'll post up pics.