We monitor the valve springs with a LSM brand on the head valvespring pressure checker, there are other brands but that is a good one.
Just be aware these types type of testers can vary considerably compared to a bench tester like a Rimac machine.
In all instances our LSM checker measures less with installed springs vs the springs tested prior to installation with the Rimac tester. It can be as much as 10-20 pounds less !
Therefore the on the head spring tester is used only for us to monitor the springs with use over time. I use a solid roller cam set up and we check the valve springs once a year when the lash is checked.
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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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