In the past when talking with Crower they were very adamant about using no lifter bore restrictors. I do not know if they have a "Chevy" type oiling system on their mind with this "catalog statement".
Or are they familiar with a Pontiac oiling system ... I cannot comment with any authority on this, but do you homework on this subject.
My IA2 set up is street use and I run a .060" restrictor with my solid roller cam.
( Information provided in this post does not represent any endorsement and is offered for general interest only )
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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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