John Kaase won the 2004 Engine Masters competition with CHI 3V heads. Below is a link to his comments on the motor:
http://www.chiheads.com/testimonials.php#video
Doug, the 3V heads have a 2V size port, raised about 3/8". The 4V head uses the same port, only opened up at the intake flange to mate with 4V intakes. Cylinder head technology has improved over the last 30 years. I imagine they build better bridges these days too. lol......
your friend on the DTBB
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