I just added headers to my 75 f100 and the manifolds are in good shape, which by that I mean no cracks. The casting numbers are D2TE9431AA and D2TE9430AA. I took a sanding block to em to clean em up a bit and they look half decent. What would you guys say they go for? Should i paint em up and throw em on a ebay auction? Or are they worth just keeping?
Certain passenger car manifolds are worth more because they are both necessary to fit around steering components or other parts, or because they have the correct numbers for show cars.
F-series? Not really. eBay them, as Buy It Now with a Best offer. You never know what someone will do. I had my stock V10 manifolds up at buy-it-now for $400 with best offer, and someone (a mechanic I think) bought them outright for $400. Just make sure you weigh them and check shipping costs before putting them up.