RF F6AE 6O90 B22A ARE THE NUMBERS ON THE HEAD. I BOUGT A 98 GT THE GUY HAD THE MOTOR SWAPPED I JUST WANT TO KNOW THE YEAR OR ANY THING AT ALL.HELP THANX
The PI swap is a very popular swap for the 96-98 mustangs. Picking up the cams and intake is the cheapest/easiest, though finding the heads for a good price is a little bit more difficult. They have definitely went down in price so just search around and you can find a good deal.
If buying used look to spend around $100 on the PI intake (with alum crossover), another $100 on the cams, and I have been watching heads go for $250-300 and some even with cams installed still. The install is the factor that most consider when they skip over the PI heads as it's not too easy of a task and a shop is going to be quite steep. The heads also bump the compression and some fear that.