Timing problem

Will look into the zddp additive and go with 10w40

I tried to get my local radiator shop to mess with it. He told me it would be $150 and the tank cost half that new so I went with new.

I had done a lot of work on the car back then. Replacing the tank and fuel line. I went with aluminum line so it was good. I got all the old gas out of the tank, lines and filters, might be why my starter went bad. I wanted to upgrade anyway as I have some short headman headers here I want to run.

Question: why will it need new wires and ballast resistor. I have a new one laying around. This one on the car now was replaced and never run.

The plugs were New Years ago so I cleaned them and sanded them on the tips.

I put a new master cylinder on it
New trans filter, all trans seals including shifter shaft and speedometer seals. Changed the transmission fluid.

Ujoints were replaced 7 years ago.

Basically I replaced a whole lot of stuff 7 years ago and started a family. I left the car sitting in front of my dads house the entire time because I had moved.
She left late last year for a married man whomalso left his wife and young son.
So I came back to a car with flat tires and non running condition, decided to bring it back to life and fully operational. I decided the double two.....while pretty cool and very functional needed to gonwith something more user friendly and reliable. I didn't want to do a custom choke and kick down cable bracket so a Holley took its place. I'll probably mess with them sometime down the road.
I've had the car 20 years. It hasn't been driven 500 miles in that time. It's gone through a slant six to a 440 and now down to a 318. It's sitting at where a dart gt would be as far as the options go and will stay with a small block from now on. Now I'd like to drive it a lot and get it completely roadworthy to start putting some miles on it. Possibly make it a daily drive next spring/summer season. I lost almost everything and this is something I had left. So I decided to start over there.
I do appreciate all your help and showing me how to do all this timing stuff. I've never Ben very old at it it I think I have it this time.

I'm going to go ahead and
Regrease u joints
wheel bearings and suspension components for good measure
Change differential oil...Should be good then.

Does differential oil break down after sitting for long periods of time?