Hi! I guess that ST would stand for suspension technique?, When I mounted my ST rear bar as it came and used the car for racing, even at at either of the three setings it rubbed the boot on the axle, was to close. I spaced up the lower mount on the adjustable link with about 1/4 in of washers, now lots of room no more torn boots. If that helps anyone. Thanks

Correct, that's why the ST kit is recommended for the early cars as it comes with all the mounting hardware thus no cutting nor drilling is necessary. I have one in the box sitting under the rear of my early 240Z waiting for me to get around to working on the car again.

Hey texasz... Call me a dunce, but, if the car didn't come with mounting holes in the frame, how does the ST kit mount to the car without drilling?

-- Mike

I believe the ST kit has brackets that replace the existing mounting brackets for the rear control arm mount (the two brackets that are bolted to the frame right behind the diff). Then you mount the ST bar to the new brackets. Whereas you have to drill a hole to mount the MSA bar.

Hey texasz... Call me a dunce, but, if the car didn't come with mounting holes in the frame, how does the ST kit mount to the car without drilling?

Here is a picture from the AZC website showing the new upright pieces that Zack referred to:

That looks like it. It's interesting that it mounts above the half shaft. That seems like a much better place. You shouldn't have as much interference there.

Anyone with Pics of the MSA bar?

As zack and jmortensen has illustrated there are brackets included in the kit for mounting without drilling or cutting. I'll see if I can dig out the install instructions and scan them then post the PDF here to help show this.

I should have been a little more clear instead of just saying "mounting hardware".

I looked in my box and there are no installation instructions. I was really wanting to share the info... Sorry guys.

The rear suspension uprights are part of the install package... they are new stampings with ears and drilled holes to mount the sway bar bushings...