Re: AFR head questions please.
I've been down this road with the AFR heads and Dynatech headers, but the answer to your question I believe depends at the very least on which Dynatech headers (small primary vs large primary stepped tubes) you have. I believe they make a 1-5/8" stepped into a 1-3/4" primary tube (small) OR a 1-3/4" stepped into a 1-7/8" primary tube (large). Obviously things get a bit tighter and more complicated with the large primary tube header. Which header do you currently have (there should be an ID plate welded on one of the primary tubes of each header, the drivers side is the one that matters) and perhaps I can help answer your question?
69 Camaro Z/28 RS, original Azure Turquoise, M21 & 3.73 12-bolt posi. NOM 406ci, AFR 210 heads, Straub hyd. roller cam & Dynatech 1-3/4" > 1-7/8" headers, QuickFuel 750 Annular. Photos at:
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