360 LA engine crank no start

I pulled the plugs and it does have spark and the carb does squirt gas the only thing I haven’t checked is the ballast resistor
I’ve done tried at 0 degrees and at 10 before TDC I’ve also gotten back tires from cylinder 6 and 8 when I started spinning the distributor while starting it to see if I can hear it trying to start but still don’t get anything

Don't worry about the ballast resistor if you have spark. If it is backfiring out the carb you may have the dist 1/2 turn (180 degrees off). HOW DO YOU KNOW you are on the no1 compression stroke? HINT!!!!!: The timing marks don't tell you this!!!!

Have you checked compression/ leak down?