I ended up with a stacked tube car with a 10 degree slant. The car came with no rear arms. I purchased a LR arm from schnee that is for a stack tube car. I have been told that I need to get custom made arms to just get an arm for the right side that is the same length as the left. The left arm measures 13 inches. Just some suggestions on what to do for the RR arm would be appreciated.

Get ahold of Steve Stapp he built stack tube cars.

Where would I go about that at? Is he at a shop or somewhere?

Why not Schnee for the Pair?

We have a maxim slant stack, and found that an eagle rr arm works.

Sounds like you are new to the sprint car game. Sell that stack tube car and start with a standard car to learn the ins and outs where you can ask anyone for help. JMO

Got the issue fixed thanks to everyone that responded as far as a direction.