Great job on the engine man, it looks awesome. In my opinion, if you plan on some more performance than get the headers. You will see improvements everywhere on horsepower and torque. I don't think you need huge ones, maybe 1 3/4 or 2 in primaries with 3 inch collectors, but, if you do you get headers you can't put painted ones on a motor that is that clean. Go ceramic if you can or save up for em', I found a pair of Hooker comp. ceramic coated for my 84' shortwide for $200 on Craigslist. They are out there but if you have the money I think they can be had for cheaper that $700. Any name brand header is going to be good, Hooker, Hedman, even the Summit brand would be good if they offer a ceramic coating. Thumbs up man, you should post pics of the car when its done. P.S. if you're going to dyno tune I would wait til' you get the headers because it could throw off you're tune a little because it will be more efficient.