What to look for when buying an engine.

Got a throttle body adapter plate from EFI source to fit a LS throttle body, but the ID of it is a bit larger than the ID of the flange on my intake. Is the ID on the car intakes larger than on the trucks?View attachment 1715325370
I could try to "port" the intke for a smooth transition or would I be better of by making a new adapter? Haven't sourced the throttle body yet so not sure which size I will go for...

Can you please take a picture of the sensors you are using on that LS TB?