Yeah I agree, that lower arm looks like something someone with a minitruck would do..lol. Tie rod notch is usually just getting some 1/4 wall three inch pipe/ tube..
useing it sectioned for the tie rod notch.. it's easier to find as Schedule40 pipe.. (probably spelled wrong)
Valves, pretty much up to you.. Accuair if wallet is deep enough, you can get valves from Grainger, Suicidedoors, AVS, and a ton of other places.. As for cups, the easiest to install are the KP Components 88-98 C1500 front cups kit. They have a bolt for the top cup that bolts thru the shocks old hole. Bags are a preference, RE 7s have stood the test of time with many. And also the bags from Air Ride, think they are Dominators?? Someone will chime in I hope..lol. Don't buy any Airbaggit.com crap, it's cheap because it's exactly that. Junk.. I'm running SS7 bags for the extra lift they give, but they only last for 2-3 years, so you probably don't wanna get them..lol
Installing front bags the main complications are bag clearance and lower control arm clearances.. spring pocket has to be cut out bigger for the bag to fit in and not scrub, weld any gaps up afterwards (you'll know where when you see while doing it) also there's tons of pics in build threads here.. a lot are drilling a hole on one side of the upper cup for the air line to go thru, older rides run them out the top the cup. Shock relocation is a give in and seen in builds here also and you can buy a shock relocator kit, so that helps some with that part..
fittings, you don't want plastic.. They break easy.. you'll wanna get some sort of metal, Push connects are popular and make working on later a lot easier.. Brass compression fittings can be purchased at most hardware stores.. They are a little harder to keep air leaks in check..lol but tried and true.
Tanks like everything else is your preference.. Aluminum, powdercoated, chromed, whatever.. metal tanks can be used in weird setups if your wanting to weld a tank weird in some tubing or something.. but metal tanks rust inside.. lol. Air management, a York if you can, there's a thread dedicated to York's (EDC = engine driven compressor) the other options are electric compressor(s)
Viairs are descent.. but loud and take forever to fill tank(s).. Tank size or amounts is also preference, a five gallon won't fill the bags without having the compressor helping, Eight gallons will depending on your set air pressure, ten gallons can fill all bags one and a half times to two times depending again on your set air pressure..
Air pressure desired is done with a Pressure Control Switch, they aren't expensive at all.. Most tanks and compressor(s) are rated to 150 psi so a 150(off) switch is recommended.. some run higher but that shortens the life of an electric compressor.. They have different pressure options like 95 on and 150 off... Usually listed like 95/150... Just means when tank pressure drops down to 95 psi the compressor will be turned on till tank hits 150 psi then compressor will be turned off..
..........damn. there's a lot,lol... switch box AVS kinda has the market on those. Best switch boxes out there and most people use them. Easy to wire up to your valves.
Air line, size is yet again a preference.. 1/2" will damn near hop and you have to gently tap the switches to drop cause you hold that down switch for even a millisecond to long and your ride is slamming down hard. 3/8" is smoother and easier to control.. 1/4" is very easy to control and super smooth but slow. 1/4" will operate close to having a Accuair valve setup..
Idunno what all I'm skipping over, just a jist of usual bag stuff... Reading builds will be your greatest asset on learning
