[boybonneville]

I have a 1970 pontiac lemans that I would like to upgrade the suspension to a more modern one. I was wondering if anyone has delt with or has this type of suspension on their car? What were and are your experiences? This is the link to their site http://www.globalwest.net/1964-72_A-BODIES.htm

[amcmike]

Negative Roll Suspension is GWs term for fixing the camber gain on older vehicles. Many older vehicles had positive camber gain which means under compression the top of of the tire moves outward. This is the opposite of what is desired or good handling.

New car suspensions all use negative camber gain. A good way to witness this (if you can stomach it) is watch an airbagged late model as its dropped from "ride" to "show" height. The top of the tire moves inward just like it would in a cornering situation (except in a corner one side is compresssion the other is rebounding). When cornering this maximizes the contact patch of the tread, giving the front tires their maximum grip.

My suspension is setup to do this, and with the combined modifications it handles and rides like my late model Z28 did. It might even be better, but I have to get my steering box upgraded to take full advantage.

[boybonneville]

Do you think that the benefits outweigh the costs? Is there any other companys out there doing a similar thing?

[amcmike]

I believe Hotchkiss and others have kits as well. Usually the improvment is through a taller spindle (on A-bodies I believe the trick is to adapt a later model B-body spindle). ATS makes their own spindle that I think works for F or A bodies. I guess another possibility is to adapt taller upper ball joints from Howe for the cheap route, but the spindle is the better move. Check out this site for reasonably priced options. I believe others here are using this stuff as well. http://www.scandc.com/suspensions.htm#streetcomp1

Some addtional reference information.
http://www.chevelles.com/forums/showthread.php?t=215205
http://www.chevelles.com/forums/showthread.php?t=202497

[boybonneville]

Thanks for that from the sounds of it G.W. has some issues with alignment. Thanks this forum rocks!

[HWYSTR455]

No, there's no aligment issue with the GW stuff. The original release of the ATS spindles had a typo in the part number(s) for the matching GW upper control arm. It was only a typo, because the GW guys worked closely with ATS (Tyler) to help develop the spindles and uppers.

Search these threads, I've posted about this before, and there are a ton of pics of just about all the combos.

Currently on my 71 A-body, I'm running the ATS spindles, GW uppers & lowers, GW springs, and Edelbrock IAS shocks. The rear is full-GW parts too. I chose the C5/6 brakes from Touring Specialties, and all together, it's the best handling and braking A-body I've ever driven. I feel it's the best package out there, hand down. The B/F-body spindle swap and the GW arms are pretty close, but then you're limited on your brake options.