I've used them before. Both Bullet and Crower recommended them for my intended use, that said my installed height is 1.900-1.910".
The springs are rated 240 at 1.900"
With that spring PAC recommends the distance from coil bind at max lift to be from 0.060" to 0.100"
( A fwiw, the Comp 943 is the same spring )
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'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
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