OOOh, youre killing me! One of the 2 vehicles I have had and gotten rid of, and still kick myself for doing so was a 69 D 100; the other? a 67 Cuda Fastback. On the disc brake swap; Unless you're wanting to maybe swap in a F J M body K frame, a disc swap onto a straight axle, kingpin
design front end is gonna be slim pickens! As long as the drums are all intact and in good working order, there should be no problem stopping that truck! Mine worked beautifully. A good friend has a '70, with a well warmed over 383, that I never hear him complain about over working the stock brakes. He doesn't use his as a truck much though, but that 383
has a huge cam and alum heads on it and he really uses the gas pedal!
I have heard that this truck is pushing 500 HP. so just be sure what yu got is up to snuff and spend your $$$ Elsewhere. 70 MPH? If your back roads are like some are around here you'll be hard presses to maintain 1/2 that as they're a mess, between the farm equip and the seasonal freeze/thaw. (not saying that there's NO place to open er up, though)
