Thread: Newbie with 307 Questions?

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I just rebuilt a 307 for my friend...got advice here and it all made sense. We were in the same boat...we had the 307, didnt want to buy a whole 350...work with what ya got!!

I used the same exact setup with the K1102 cam and 416 heads. The boost in compression using the 416 heads will put some punch into that motor. The 601 heads with the smaller cc would make the compression a bit too high for my taste. The Summit K1102 is a great match for the 307 with those heads, it will give good torque and good driveability.

Your other questions:
Intake - 2101 or similar dual plane aluminum will be great.
HEI - perfect.
Carb - 650 is fine, maybe a bit big, you can always jet it down...a 600 should be perfect.

Also, a decent set of headers will be worth some extra power.

You'll have a nice street motor when its done.

Good luck!

Originally Posted by 63BoxNova

650 is fine, maybe a bit big, you can always jet it down.

Every time I see this statement, it gives me pause, wondering what area of science it came from. I have been in some heated discussions with another member of this board about this statement. According to everything I've learned over the past 50 years, the throttle bore size and venturi size dictate the CFM of a carburetor, not the jetting. The jetting you choose only changes the relationship between the amount of air compared to the amount of fuel that is being pushed into the ports by atmospheric pressure with the intake valve open. A 650 CFM carb is a 650 CFM carb, no matter how you change the ratio of air to fuel by changing the jets.

Denny, I have a lot of respect for your knowledge and will not ever argue with you again. I might end up clutching my chest and falling onto the keyboard!!!!

Suffice to say that you have your beliefs and I have mine. That's why there are over 400 different religions on this rock, because not everyone believes the same. Peace brother.