[surfbeast]

go with 3:73 gears or maybe 4:10's. You need alot of extra parts with the PI swap so buy the full kit off the net GEF racing or parkway ford. About 1100 bucks for everything. Or buy the used heads and the parts you need. Swap out that exhaust with a full header back kit and get some pullies and your done. well, not quite done, then you'll want a supercharger or nitrous. Then you'll want.............. It never ends!!

Good luck!