You might drop FPA a line and ask. he builds alot of odd ball ford unibody big block header applications. i did not see your specific application on the site but they might have 385 series sets for another chassis that might work. web site is
www.fordpowertrain.com phone is 253-848-9503. i installed a set of shorties on my '64 thunderbird. headers are good build quality but it did take a day to make them fit the chassis properly. good luck.