if you want to build power in that thing im one of the mangs to see im a panther chassis mech..
two extremely helpful sites are grandmarq.net,and crownvic.net as well, basic bolt ons, id start with 2.5 inch dual exhuast,gears,a J mod,and a shift kit. and just a like a mustang you can utilizes bigger TBs, MAF and injectors as well. they do make longtubes for these,but they are hella expensive to the tune of 800 bucks or more. pm me for more info if youd like.