Are you sure you have the correct fuel pressure? Do you know about the canister filter back by the tank, it looks like a small coffee can. When they get clogged of course the car won't run. Does it rev good when not under load? Do you have the "pill" for the timing put back in? Did you happen to put a couple of wires to the fuel pump relay under your drivers seat when you did the conversion? Just trying to give ideas that may be the issue.