i think you shouldn't do brake work if you don't know much about brakes, trust me, i know brakes

 

Where is the proportioning valve at? lol

haha, alright smart ***, I know how to change the pads, install calipers, and bleed them. Ya know? the simple stuff lol

 

been a while since i was under a 70's truck but i believe it is right in the driver's side frame rail near the first cab mount. either way, it's impossible to miss, big block of metal in the brake lines near the front somewhere

 

Alright well I bled the brakes real good again, I guess there was still some air in the lines.
I took it for a test drive, mashed the brakes and about kissed the windshield. lol

 

I definitely thought it was that new caliper full of air.
Glad to hear you got her fixed