Tad hard to start......pretty sure fuel issue

"Todays fuel." Having said that, didn't sound like it was all that warm.

FIRST eliminate spark as the problem. CHECK you key on/ engine off voltage to the ignition system. Next check cranking spark and take a GOOD look. Have a partner use the KEY to crank the engine. That is IMPORTANT. Check spark with a grounded probe such as a clip lead/ screwdriver held near the top of the coil tower. Should be a nice hot blue snappy spark, 3/8 min, 1/2" or more better long.

Take a critical view of your coil wire and spark plug wires, cap and rotor

NEXT make sure your timing is in good shape. You want lots of initial depending on the cam. Mine is "about same" as a stock 340 and even that likes 15-17* initial.

If that is OK, or you find and fix a problem, THEN attack fuel.

Best things I did on my 67 was

1--went with rear mount electric pump

2--installed heat spacer under carb

3--built vapor return system using the Wix 33040/ 33041 (5/16 and 3/8") fuel filters which have a 1/4" return port with built in orifice.