depending on what you want to do with the car... those headers are not the greatest. they are 1 1/2 primaries and shorties with only a 1/4" flange and 18 gauge. I would hate for you to spend the money to coat a pair of headers that won't last as long as the coating.
let me look for some headers for you and see what I can come up with. I know you want shorties since your car will be in the weeds

Buying headers coated will be cheaper in the long run rather than coating those headers.
talk to ya soon
Rich