1970 gmc half ton disk swap

[Zachary17]

So I bought a 70 gmc a few days ago and and my plans are to fix it up and drive it.going over the truck I found that the front end is Beyond wore out no brakes.lots of play in everything it’s sat for 15 years.it still has drum brakes on the front I want to convert to disk while I have the front end apart l.I don’t want to use a aftermarket brake kit.I do have brand new hd spindles for a 73/87 c10 and ball joints.can I just use the 73/87 spindles and brakes and ball joints or do I need something else(
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