Old hat...

AJ/FormS said

Are those iron heads?

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Yes. '69 'X' heads.

AJ/FormS said

What elevation?

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1400'

AJ/FormS said

What cubic inches?

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346CID (.040"-over 340)

AJ/FormS said

Is that Holley a Vacuum secondary?

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Holley makes a DP vacuum secondary? I've never gone looking for one, but didn't think such a carb existed. Anyway, no. My carb is mechanical.

AJ/FormS said

A-body?

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Yes. '73 Duster.

AJ/FormS said

I have a 360 with the next smaller cam HE3037 and 10.9Scr measured. I also run the A833, but with 3.55s. She has over 100,000 miles on her and still going.

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With a distributor curve that looks like what?