did a motor swap, high idle ?

Swapped a 13 motor into a 12 pro ride
fuel rail is from 12,injectors, stator etc


fired it up as its about done and its idling around 2700 RPMS


throttle bodies are fully closed at idle, kinda confused about where to even start with this one
any advice?

how can I tell If its a crankseal? would the plugs show the difference?
the intake boot should not have any cracks I gave it a good look over while dropping it in but it is the old one and I cant rule that out


and I should rephrase NEW motor, new to me ordered off of ebay from a junked sled


I also have no throttle sitting on it right now, I had a munster on it and moved it over to the new sled after the motor went down, would something like that be causing this?