HELP! Starting problems, Electrical? Any Ideas?

[Rodents]

So my truck has been starting just fine.
Then yesterday I get in it turn the key, the starter engages and after a couple of seconds of trying to turn the motor over it just stops.
Now when I turn the key I get nothing?
No click of the starter/solenoid just silence?
All other electrical seems fine (all lights are working, etc...)

I tried bridging the contacts on the starter solenoid to directly turn the starter over but nothing happened, just a couple of sparks.

Details:
1961 c-10 stock 235 inline 6 with alternator update

Any Ideas?

Thanks!!!!