i know that when people have 96-98 mustangs they usually do the Pi, H/C/i swap to run with the 99+ mustangs. i also know that they can even be a little faster due to higher compression. what is the compression usually. would it be too high to put on a blower?
compresion on 99-00 engines is 9.0:1. the 01-04 engines are 9.4 or 9.5, i can't remember which. a headswapped 96-98 will yeild 10.0:1. you can supercharge at 10:1, but it really isn't a good idea. if you get some bowl work done on the heads, you can lower the compression. ideally you want to be around 8:1 to 9:1 for boost.
Just do the PI headswap then grind out the swirl dams and your compression will be right around the same as the 99+ GT's it might still be a little bit higher but it will be safe to run a blower on it then. If u do get a blower as soon as you can get forged rods because the ones in there suck and also forged pistons will help also.