"I have had 2 Butler Pro Pumps and had issues with both. After doing a take apart study on the pumps, I found that many of the "modifications" either did not exist OR were counter productive to mitigating cavitation or high flow. After many discussions with David Butler, he agreed with my synopsis. I sent him a comprehensive write up. Butler has contacted their pump supplier and I believe Butler is in discussions with Mark Luhn to start carrying his pumps due to Mark's higher quality pumps that DO include REAL upgrades."
Source:
http://forums.maxperformanceinc.com/...=807179&page=2
Post number 28
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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