fuel rail inteferrence with throttle body even with the injectors sitting lower in the intakes the fuel rail will hit the throttle body and will hit the throttle mechanism. you will need to move the throttle body outward about 3" to clear the area and it will need to go up about 3/4' too
I was talking to Rob at force fuel injection. He said his standard price to convert an intake and make fuel rails is $400 and to plan about $3000 for everything you need including the intake conversion