Install Easy

Cost not so much.LOL
If this is your first FE adventure then you will find that FE related parts for your Fairlane will cost MORE.
I encourage you completely. IMO the 66/67 Fairlane is very high on the Kool car list. With an FE it is in the Top 5.
Your at the right place to do the swap though. A ton of info here.
You could be looking at this mess.

It is a true GT though.