Hard start when warm 94 5.7l 3500 5speed just installed motor

[The squidward]

My 94 has 350000 before engine give out I acquired another engine with187000 before installing g I gave it a complete tue up plug wire cap rotor oil sending unit temp sensor after the first attempt to rank discovered feul pump went out.bought a new one installed it runs great better the the other one ever did it gets to running tempafter I shut off and try to crank up again itacts like a vapor lock or flooding not sure which. Hold my foot to the floor and it does start to stumble and crank. Any pointers would be appreciated. Oh and I used my distributor cause there wasn't one In the replacement motor.

 

[Schurkey]

1. Proper punctuation, spacing, and sentence structure would be greatly appreciated. You are not sending some cell-phone text message to people you know well.

2. What is the fuel pressure at prime, AND under load?

3. Connect a scan tool, verify all the sensors and computer outputs; look for RPM when cranking.