Truck arm rear suspension

[Pyrotechnic]

What are the options for exhaust with the truck arms ? My mufflers are just ahead of the rear axle, seems they would be in the way of the arms ? Never seen the exhaust on a stock 67-72 but imagine the mufflers have to be ahead of the trailing arm crossmember ?

[KQQL IT]

Originally Posted by 68 TT

I have Cal-Trac's on my Camaro and have run them on several other cars. They work fantastic for drag racing on a leaf spring vehicle but just aren't meant for the street if you want to go fast around corners. The Camaro gets terrible oversteer if I hit a bump going around a corner.

They don't let the rear end articulate like it needs to so the vehicle has good street manners. Most guys who run them on the street and track back off the link bar so they have a pretty good gap at the front pivot bolt when they take the car on the street. This diminishes their straight line capabilities quite a bit. It only takes a minute to make the change but for something like CPP's truck doing auto-x the Cal-Trac bar just won't behave well. Truck arm is far superior here.

Like a truck arm can articulate? its just like ladder bars

[68 TT]

Originally Posted by Pyrotechnic

What are the options for exhaust with the truck arms ? My mufflers are just ahead of the rear axle, seems they would be in the way of the arms ? Never seen the exhaust on a stock 67-72 but imagine the mufflers have to be ahead of the trailing arm crossmember ?

It is kind of tight in stock form. Most people with big exhaust cut openings through the crossmember to route the tail pipes.

I did see one who routed the tail pipes under the rear axle. Don't know how well that worked though.

[68 TT]

Originally Posted by KQQL IT

Like a truck arm can articulate? its just like ladder bars

The rubber bushings allow more articulation than you would believe. A ladder bar system would articulate if it didn't have a diagonal link bar tying one front mount point to the rear of the other side. With a panhard bar like the truck arm it would articulate pretty well.

With the Cal-Trac pivot bolt snug against the spring and preloaded like it needs to be to work well there is literally enough pressure on the spring that you can lift the whole back end of the car by putting a jack under one shock plate.