I dont have those hedders but do have the 1 3/4 hedmans on my 78... been on there for 15+ years uncoated, the paint i used has burned off & there is surface rust and stains coming through the paint thats still good. Im very happy with them & for the price they are hard to beat for fitment and installation. Stiull using the supplied paper hedman gaskets too!
mainly wanted to comment on the wrap... its nice for uncoated headers but shortens their life a lot, a friend wrapped some cheap sbc headers and they rusted through in like 5 years. Ceramic coatings reduce the heat quite a bit but just as important protects the headers from rust, I have some hooker O-port headers that were coated by a local shop ~10 years ago & they look like the day they were coated, lots of street mile, drag strip runs and even dyno time. If you ceramic coat them, consider not wrapping them, will look and last a lot longer.
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