First time engine build won't fire

If you pour gas into the venturies;FIRST,move the car outside, away from any valuables.
Then;you better have a fire extinguisher nearby,and if you see flames, use it!!
I don't like that idea at all for a newbe.

Start with a properly filled carb, then follow post #8.
Once it's running post #12, has it covered.

I just gotta add, that it sorta sounds like the intake valves are not sealing. Normally I would suggest a compression test, but with the break-in lube being cast off the cam with the already excessive cranking, I'm not so sure at this time,that it's a good idea. .
So if you just can't get it going with the above helps, Then, do a compression test. It may be that your valves are not closing. But it's too early to go there, just yet.
My feeling also. Adjustable valve train? Does it sound like it has compression or does it spin real fast.