I have a 69 Bird with 722 heads. I'm running ceramic coated Doug's headers and they fit great with plenty of clearance everywhere. I did not have to ding them or modify them in any way, as a matter of fact the install was very easy. No tubes go around the subframe and I can fit an extra long oil filter. This is on a manual steering non-A/C car. I did purchase these headers about 10 yrs. ago before Doug's was purchased by Pertronix so I can't say how good they will fit today. The down side is that they are expensive but you get what you pay for.
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