Another 440 duster need some help

You will need a manual brake push rod relocated in a different hole in the pedal but the master cyl may be the same. Check the parts books for application.

Engine combo plan sounds good assuming you have the compression ratio to go with the cam. You should be in the 10.0:1 neighborhood. Pocket port the heads!! Headers should be 1 7/8" - 2" (preferably 2") and I have no idea who has the best these days. The fender well type was about it 25 yrs ago and you couldn't run a large diameter front tire. I believe the late model through bolt K members will accept the 440 with the correct mount brackets. I'd just go with the 440.