I didn't really go into great detail about what I did to mine, but there are a few similarities with your story. I rebuilt my 302 in '75, using the original heads/intake and crank/rods, but I used Manley 12.5:1 pistons, and polished the rods. Removed the original manifolds (stored them !) and added headers, replaced cam with a Sig Erson stick, a Mallory dual point with a Mallory coil, and pulled the 4053 carb and added an 850 DP, Mr. Gasket Pro Shifter on the original Muncie. Yeah, it ran like a proverbial scalded dog (sorry, PETA), but at that time and my age, who thought about restoration ? I was lucky to have saved what I did. 1980 was the awakening point for me - realized I had an X77 Z, got the documentation from the DOT (dealer invoice, MSO, title copies), and then started about collecting NOS parts to restore the car, and been at it ever since, adding cars and parts to the garage over the years.
If your wiper motor is the original, be careful with it - one year only part number I believe, RS headlight washer valve, rare to see them intact. I've rebuilt a couple of them - Impala Bob's is the only place reproducing the valve (beat me to it, I tried for years to build the molds to reproduce the valves as I have a Z11); do not swap your core motor for another, as they are stamped with the correct number on the bearing cover end plate - pretty costl;y to replace. 293BR is the correct coil for the stock 302.