Magnum swap starts, does not run

Thanks again for the input. I've had some time here and there to check some things. First, let me clarify what the engine is doing.

It's not actually starting all the way. It catches enough that you think it's starting so you let go of the starter and then the engine chugs along for a while before dying. Sounds like only a couple cylinders are firing.

This set up has the fuel regulator on the rail itself. I rechecked pressure. With key on, it goes to about 12 PSI and bleeds off. During start, pressure goes up to 45 and stays there until the engine stops "running".

We re-checked all the grounds and they are tight. Spark from coil wire to ground is good. Spark appears good at the plugs.

Last night I checked one of the injectors and it is pulsing during start. Didn't check the rest since I didn't have time.

At this point I'm wondering if it's in time. Engine ran when pulled and distributor wasn't messed with. Cap, rotor, wires and plugs are new. Firing order was triple checked.

I'm wondering if the automatic's tone ring is clocked differently from the manual trans flywheel I'm using. If that was the case, the computer could not sense the correct timing. I've heard some guys say a manual trans PCM is required, others say the Auto PCM works fine. Called B&G Performance today (who reflashes the PCMs) and he said a manual trans PCM is required.

I might be able to put a timing light on it tomorrow.