The headers for the Gen III Hemi (I believe) are all of the "shorty" and aren't all that helpful from a performance standpoint. I adapted Ford 302-351 headers to my Poly in the late 90s by way of a custom adapter I made. The port spacing is pretty close but it's the flange angle and bolt hole differences that you need to get around. I refused to go the TTI route and pay $ 750 (at the time) for mild steel headers. I paid $200 for very good quality stainless headers off of eBay.
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