Do I need to notch my bores?

**Darel** · 10-23-2002, 03:48 PM

I have a '66 390 with C1AE-6090-A heads. I have the heads at the machine shop now, and it needs all new valves. I would like to put the larger 2.09 CJ intake (only) valves in it, since they're getting replaced anyway. I know a CJ head will bolt onto any 4.05-bore block without notching, but does the same hold true for the bigger valves in a different head?
Thanks,
Darel
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**Stanley Superior** · 10-23-2002, 07:07 PM

The heads with the larger 2.09 valves will clear the bore with no problem. Its even better if its over-bored a little, but it still works. Its when you try to install 427 heads on a 390, that you run into major problems!
You'll be fine with your parts [img]/phpBB/images/smiles/icon_smile.gif[/img]

**Darel** · 10-23-2002, 07:27 PM

That's what I thought. Thanks a lot!
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