I meant to say CALTRACS.
https://calvertracing.com/product-categories/caltracs/
A interesting tid bit for conversation. The Calvert split mono would more often than not be a good choice if you are using their bars. It probably doesn't apply here but in a heavy car some go with a multi leaf spring.
Many years ago John Calvert was working closely with Landrum spring company, this before the introduction of their split mono spring, and they recommended a 300 rate spring on my car back then.
This was before their split mono spring and today I believe they would not recommend one that is that that stiff.
.
__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
Old information here:
http://www.hotrod.com/articles/0712p...tiac-trans-am/
Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine)
5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE