like matt suggests, a couple of coke bottle lids down the carby may help . Likely the fuel pump may not want to prime up at starter revs.
Whats the steel can between the hose and the carby, connector or inline filter ?
If it tries to fire on the coke lids and pump still want prime, you could reverse engineer that hi-tek fuel tank and gravity feed it into the carby inlet hose. This should fill the fuel bowl up. To confirm fuel in the bow, whilst 'NOT' crankng over the motor (you could loose more than you eyebrows if it backfires), look down the primary throat (RHS throat in above picture) and pump the throttle linkage, you should see a jet of fuel squirted into primary throat or see a mist rise, confirming fuel is in the bowl. It should start and run for a little while with the fuel bowl full. Reconnect the pump line and give it a go.
You could also run it off gravity feed, but remember to put the line from the pump into a container in case it comes good.
Another trick is to put your airhose blower into the tank plugged by a rag to add a bit of positive pressure to help the pump prime. your not aiming at a perfect seal with the rag (dont want 100psi pushing into your pump) just a bit of pressure to help the fuel upto the pump.
If you think youve flooded it by adding too much full, just hold it at full throttle whilst cranking to flush the extra fuel out.