Got a buddy with a new motor and stock fuel injection set up on it.he finally got it to start but it wont keep running.It ran decent on the old motor but we dont know if it was the old motor or the injection,so if anybody has any tips id sure appreciate it.

The stock FI is a simple system. The biggest problems are vaccum leaks and dirty electrical connections.
First do the basics adjust the valves, compression test, check for vaccum leaks. If you don't have access to a smoke machine, use compressed air regulated down to 3 psi and soapy water in a spray bottle to check all connections. Check all the electrical connection and clean them with contact cleaner.The 1970 to 1979 Bentley manual has the test procedures for all the inputs, fuel pressure. A tach signal and a switch in the air flow meter are used to turn on the fuel pump.