Not Ranked
I have a dual plane (performer RPM air gap) on my 427w in my Kirkham. This engine has a 5600 redline and more power than I know what to do with. I wouldn't have it any other way!
I ran a victor jr. on the 392w in my Factory Five coupe. Both engines had a 750 Holley carb and the same Ford Z heads. Hands down the dual plane wins for my uses (spirited street driving).
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RCR GT40 SOLD to Fast 5
Kirkham #690 289 FIA
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