65mm Explorer Throttle Body Or Aftermarket Throttle Body?

If you don't intend to run EGR, you can eliminate the spacer.
That is how I installed my son's GT 40 setup and 65mm TB.
I had to fab a bracket to install the throttle cable, but you can buy those if you want, I'm just a cheapskate.
The throttle mount adapter plates are cheaper and much thinner than an EGR spacer.