98 explorer 5.0 in 92 coupe

it's not difficult.

just keep in mind that that intake won't have egr, and the heads have no air pump bypass hookups in the back. you can pass smog without that, but you won't pass smog without egr.

It's as simple as a straight up head and intake swap. they bolt right on. You'll have spark plug clearance issues, as the plugs are at different angles.

most run 90 degree boots and are ok, but I'd suggest the ford racing headers, they're designed to work with the gt40p heads...

you'll need to drill the intake for the act sensor if it has a boss. If it does, it'll be on the right back. If it doesn't, extend the act line and put it in your airbox.

the stock 19# fox injectors are plenty, if the explorer intake has the injectors on it, those are 19 pounders too, use them, they have a better spray pattern

the spark plug angles are different, I mentioned that...that's why you need p headers or 90 degree plug boots