classicinlines.com has tons of stuff, fordsix.com has tons of info on the for I6 best first upgrade is converting to electronic ignition, than induction (2 bbl adapter or mill your head to take a 2bbl carb) than header (long tube is best but much more expensive) than go for a cam (depends on your header choice and carb cfm and wether your running an adapter) but definetly switch over to electronic ignition, pertronix, or duraspark are the way to go. classisinlines.com has sells a DUI distributor kit, but it's very expensive, but does make more power (classicinlines has a tech section with dyno results on tons of stuff)