Hey, so, my engine has been rebuilt and is now back on the subframe.

It turns over via the starter and occasionally chugs a couple times as it tries and fires, but never picks up and runs on its own. Twice now I've also had 4 foot fireballs shooting out the carb when I've been fiddling with the choke and throttle whilst cranking... I've checked the timing, I had the spark plugs out, valve covers off, and distributor cap off - so checked thoroughly - and all is well. I am getting sparks at all leads at the correct time. Onto fuel, and this is the weird bit. The pump is definitely sucking up fuel, and is making it's way into the carb. Here's the weird bit: with all spark plugs out and cranking the engine, pots 2 and 4 piss out liquid fuel (out of the spark plug holes) whilst all others are bone dry. This is where there seems a problem... Seems like the carb isn't vaporising the fuel, or if it is, the fuel is somehow not making it to all cylinders (possibly problem with intake passage or cyclinder drawing it in??). The car was on a slight slope meaning the intake was lowest at the 2 and 4 ports but even when jacking the front up so these 2 are the highest, the same 2 cylinders are squirting out fuel and the others not even a whiff of petrol.

I'm at a bit of a loss here... Please could anyone give some advice/suggestions? Really want this to fire up!