80z284spd

What are best suggestions for suspension of an 80 z28 w/ over 400 horse to wheels .It still has the stock posi etc. Shocks,springs,rear???Not to expensive but that candle this beast

leadfoot4

iTrader: (1)

I think that 2-3 suppliers, such as UMI od BMR, Detroit Speed&Engineering, and Heidt's Rod Shop have recently released some new designs for the 2nd gen cars. You might want to check their websites.

BMR Suspension

iTrader: (6)

BMR Torque Arm Suspension



This kit is available for both the 10-bolt and 12-bolt rear axle housings. List price is $2599.95. That may seem expensive at first, but look at these features and benefits:


Features:

• Includes double adjustable coil-over shocks with all mounting brackets, spacers, and hardware.
• Eliminates the archaic leaf springs.
• Adjustable spring platforms on the coil-overs allow the driver to lower the car for autocross events and then raise the ride height for street driving.
• Includes a Watts Link that centers the rear axle housing and eliminates side-to-side movement.
• The Watts Link has 5 vertical mounting positions. This allows it to be adjusted for different ride heights and roll centers.
• Includes an integrated driveshaft loop.
• The torque arm is mounted close to the driveshaft. It moves up and down simultaneously with the driveshaft, so there are no clearance issues.
• The torque arm tucks up close to the driveshaft for maximum ground clearance.
• The torque arm front mount has a greasable Delrin bushing that is fluted to hold the grease in the bushing where it belongs.
• The Delrin bushing slides on a telescoping shaft which is allowed to pivot on a greasable, low-deflection polyurethane bushing.
• The torque arm front mount can slide, rotate, and pivot freely for bind-free operation.
• The lower control arms have 3 mounting locations to provide adjustability to the instant center location for a variety of horsepower levels.
• The lower control arms mount to the rear axle housing with QA1 rod ends to allow full articulation and bind-free operation.
• The lower control arms mount to the body with greasable, low-deflection polyurethane bushings to minimize noise, vibration, and harmonics. This poly/rod end combo is a great compromise between handling and ride characteristics.
• Proudly Made in the USA by BMR employees at our Florida manufacturing facility.

Benefits:

• A torque arm suspension is the ideal suspension design for cars that will be autocrossed, drag-raced, and street driven. The BMR torque arm suspension puts the instant center in a location that works well for all types of performance driving.
• Simple installation that can easily be done by the average enthusiast in the driveway with normal hand tools.
• Low cost installation if performed by a professional shop. Average install time is 6-8 hours.

Options and Upgrades:

• Color – Available in red or black hammertone. No charge for powdercoating.
• No upgrades necessary. This kit includes all the best components.
• Transmission crossmember is required and sold separately ($339.95). Crossmembers are available for the T56, M6, TH400, TH350, Powerglide, 700R4, and 4L60E transmissions.

Mods Required:

• 4 holes must be drilled in the frame. That’s it!!! No welding. No cutting-up the floor. No notching the frame.
• This suspension kit can be removed in the future if the owner wants to put the car back to stock

Learn more about the Torque Arm Suspension by visiting the BMR website:
http://www.bmrfabrication.com/f1/f1ta.html

leadfoot4

iTrader: (1)

Yeah, the BMR torque arm set-up was what I was thinking of....


Of course, if you don't want to get that elaborate of as expensive, a good set of HD rear springs, combined with sway bars and shocks, and poly bushings will work pretty well too. That's what I had under my 2nd gen car, back when I owned it ('76-'01).