Hard starting after fuel pump relocation Options

[Jameel]

I recently did an engine out service, replacing all the fuel lines with new SS from Tangerine, new lines to the carbs which I also rebuilt, and relocated the fuel pump to the front trunk, alongside the spare.

When the car sits overnight or for more than say, a few hours, it takes a lot of cranking for it to fire up. It catches right away, and fires very briefly, but never stays running. I have to pump the hell out of the gas before it starts. It acts like its just getting little bursts of fuel, so when cranking it will fire on an off during cranking, but only finally roar to life after maybe 30 seconds or more of cranking. Once it fires, its fine.

Is it possible that my fuel pump being up front has caused this change? It's a Carter pump, 3.5psi, brand new. I was running what looked like an old 70's era Bugpack pump before, right under the engine on the firewall, and it performed great. Never had a hard time starting.

I have tried letting the fuel pump run (key on 2 clicks) for about 30 seconds, then cranking. It usually fires after 2-3 brief successive cranks when doing that. Perhaps that's just my new starting procedure?