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Rallye469 · 04-06-2008, 12:27 PM

I think you'll find that the carb on your 307 will be very restrictive on your
425. You'll want to look at 750 cfm probably.

I've never run an OB4 intake but, is there no way to grind off a bit of it
to fit your HEI back on?

04-06-2008, 12:27 PM	#4 (permalink)
Rallye469 Senior Member Join Date: Feb 2008 Posts: 223	I think you'll find that the carb on your 307 will be very restrictive on your 425. You'll want to look at 750 cfm probably. I've never run an OB4 intake but, is there no way to grind off a bit of it to fit your HEI back on? __________________ '70 Rallye 350 '65 F-85 http://www.youtube.com/watch?v=CCw-JmwNGZQ