i currently have a completely stock 1980 el camino and im looking to up the mpg and performance the is the 267 v8 2brr carb. im going to buy new headers and put dual exhaust on it i know that much will help a bit. i would appreciate some help

 

SUGGESTION: Forget headers - the exhaust gaskets are a pain in the neck to mess with - and in some states this year STILL technically requires the use of catalytic converters for at least a couple more years (like in NC)

My '80 has the 305 w/ headers and duel exhaust