1977 Ford F150 cranks but won't start (see details). Any ideas?

This 1977 Ford F-150 has gradually built up a "won't start after sitting for over a week" problem. Once it does start, it keeps starting perfectly all day -- and its on-road performance shows no signs of trouble; it runs great; no stalling, no roughness.

Its emissions seem fine…
2018 - HC 90 loaded, 171 idle / Cmox 0.09 loaded, 0.84 idle.

Though it's a 1977, it has only 126K miles on it; I bought it used in 1987. I've driven it sparingly since 1991, but I start & run the engine regularly to keep it in good shape. The last time it started was in early December 2018; I've tried various remedies (checking ground, etc.) since, with no luck. The battery is new, from January this year.

The last time major work was done on this truck was the late 1990s (carburetor overhaul, maybe other items); as far as I know, the ignition module is the same one as when I bought it in 1987; the plug-in connectors look very weathered on the outsides.

Suggestions will be appreciated!

2009 F150 Front Diff Axle Seal Leaking?

I have a 2009 F150 FX4 Crew Cab and I bought it used. I had the LH axle seal leaking shortly after buying the truck. I replaced it about 2 months ago and it just started leaking again. When I replaced it the first time I used a National Seal brand. Prior to it leaking the first time, the IWE s took a dump and while replacing them my brother broke the threads on the CV shaft so I replaced it with an aftermarket as well. I replaced the OEM IWE s with Dorman IWE s that are engaged all the time rather than being vacuum ran. I'm not sure if the mixture of the IWE s, aftermarket axle, and aftermarket axle seal have caused my problem or just a S*** seal. Anyone had this problem. If its the seal brand, does anyone know the Motorcraft/Ford seal number?

How much to fix head gasket?

I'm a college student and thinking about buying a cheap 4wd vehicle to have and there's one person that has a 2002 ford f 150 with 126,000 miles on it and said it just started to leak oil out of a head gasket how much would it cost to fix and how much should I pay for the truck?

I have a 1993 ford f150, cluster problems?

I have a 1993 ford f150, recently i was cleaning my cluster gauges and i took off the arrows on the gauges and now my fuel gauge and voltage/battery gauge won't read right/move? I was wondering is their a way to get them back to normal reading, Any information will help? Yes the fuel pump works fine. Thanks in advanced and have a good day?! I have a 1993 ford f150, cluster problems