Aftermarket Upper and lower trailing arms, is there a difference beside the name and in some cases a huge price tag. My 72 is primarily a daily driver and I’m looking for better handling where I don't have to hold on to the door handle when making a turn. I replaced all the suspension and bigger front and rear sway bars, the handling have improved some. My lower control arms are not boxed I bought the kit to do it, but I'm wondering if I should just replace both the upper and lower with an aftermarket set such as Edelbrock or Hotchkis or are the ones advertised on eBay good? And also the trailing arm mount braces should I invest in them also for better handling.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=7961242896&category=33583


Item number: 7961242896

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33583&item=7965447188&rd=1

Item number: 7965447188

This set mentions aluminum bushings.

The first ones are steel bushed, big time no-no. even wose than the second set which are polyurethane. UMI does offer a control arm that uses spherical bearings, well Ryan says they will. Who knows when it will happen.

Neither of the 2 examples are any good. Keep looking, Edlebrock makes a nice upper arm. You can make your own lower arms that will be much better than any of the arms you can buy and for less money.

Thank you for your reply. I do have the adapter to box in my lower control arm, by doing this will it be just as good as either Edelbrock or Hotchkis? And the Upper's should I try to fabricate something to box them in also. I replaced all the bushings with standard stock Moog, should I consider replacing them with polyurethane? And any other suggestions on helping stop the body to sway so much in corners, where the passenger ends up in my lap, that's not all that bad depending on the passenger….

Thank you for your reply. I do have the adapter to box in my lower control arm, by doing this will it be just as good as either Edelbrock or Hotchkis? And the Upper's should I try to fabricate something to box them in also. I replaced all the bushings with standard stock Moog, should I consider replacing them with polyurethane? And any other suggestions on helping stop the body to sway so much in corners, where the passenger ends up in my lap, that's not all that bad depending on the passenger….
Nothing you can do to the stock arms will make them as structurally stiff as tubular arms or the link/sleeve arms.

You are best for a driver with some nice tube lowers using spherical bearings and running the stock uppers with the rubber bushings, DO NOT USE POLY BUSHINGS IN THE BACK EVER!!!

Suspension bushings do not control sway as much as you may think; you may need to look into some springs, shocks, or possibly sta-bars.

I completely rebuilt my front and rear suspension on my 68 Chevelle last year with all new Moog components. The setup is stock except I used Moog springs for a 69 Chevelle with the HD suspension option. (P/n 5380 front/ 5385 rear) Rebuilding the rear control arms with all new rubber bushings solved most of my pinion angle problem, but I still had a slight vibration. I just installed the Edelbrock adjustable uppers with the spherical bearing and left the rubber bushings in the axle. The installation of the Edelbrock uppers made a noticeable difference in the way the car drives. The rear suspension seems more compliant than with the factory arms and it tracks better too. The lower arms are stock except for being boxed when I rebuilt them last year . I would definitely reccomend the Edelbrock uppers from my experience.