Anyone swap newer front/rear axle/brakes into 1970 C10?

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Hello, I am looking to possibly upgrade my brakes/suspension on my 1970 Chevrolet C10 LWB, which I am also going to be shortening to a SWB. I was wondering if anyone has swapped a newer rear axle (full setup with brakes) into a 67-70 truck. I have seen some people from the forums use 1971/2 parts to get disc brakes, but I would like to use something newer (preferably from the the 90s GmT400 series as that is what is most abundant and cheapest where I live, and the newer the better). I would like to have disc brakes in the front and drums in the rear. My truck currently has drums in the front (2wd) and drums in the rear (trailing arms with coils) and I would like to keep the trailing arms, I just want newer brakes really.

Should I keep the original brakes and just replace the internal parts and brake lines? Or do a mix of both newer used and original parts?

The rest of the plans are as follows (over the next year):
2004-2006 5.3l truck engine from junkyard along with trans and ecu
shorten frame and bed to swb length
And replace rusted cab rockers, corners, floor supports (floor itself it pretty fine except for in the back corners)
***This truck is meant to be a weekend/trip to the lake cruiser***

Any info would help, thanks!