As I went through the mechanical rework of my '69 RS, I broke the project down into sections, which included.
Front Suspension (removal, disassembly)
Front End Disassembly (engine and transmission removal, front clip removal, sub frame removal)
Engine / Transmission Rebuild
Detail Driveshaft - new ball joints
Cowl Detailing
Heater Core Replacement; Master Cylinder Rebuild; check windshield wiper motor, windshield washer pump; heater blower
Sub Frame Restoration (urethane bushings in the sub-frame; clean, blast, repaint sub frame, etc.)
Hydroblast underside of body from transmission tunnel to cowl
Repaint underside of body semi gloss black (note: the vast majority of the underside of my car was undercoated -
which I did not remove - it had worked for 40 yrs so I left it intact for the most part)
Engine / Transmission Reinstallation as a unit
Front Clip Reinstallation
Remove Rear End
Remove Gas Tank
Remove Old Leaf Sring Bushings
Clean, seal, detail gas tank - new sending unit
Clean, detail rear end - new hard line brake line
Hydroblast and clean bottom of body above the rear end and gas tank
Paint cleaned area, rear end, and leaf springs with "Rust Bullet" semi gloss black
Final detail pain of leaf springs to correct color
Reinstall gas tank
Reinstall rear end with urethane bushings
For each section I listed out individual steps in an Excel spreadsheet so I could keep track of where I was and the cost associated with each step. Nothing fancy, but it worked for me.