Help - Crank but no start

[Starwood]

Hey Fellas -

So - she was warming up one morning and as I was two steps away from getting in and taking her for a spin - she just stopped.
Cranks over, but nothing more...just a starter grind.

HISTORY:
Checked and cleaned fuel filter. It was nasty and I thought that was the fuel block. Nada.
Replaced Fuel Pump
Checked connections under dash and followed with no sign of kinks.

NOTE: If I put starter fluid in carb, she will crank, turn, and try to run, but then fails again after a few seconds. Spark issue?

Please let me know if you might have any ideas before I flatbed her to my very reliable (but expensive), Classic Car mechanic shop.