Iowa Chapter Director
Join Date: Jul 2002
Location: Ames, Iowa
Well I'd say since you have reasonable automotive experience, you should consider a single port 4.2 swap. All you'd need is a 4.2 engine, 01+ mustang oil pan, and a 4.2 flexplate (and some minor things) and then just swap your single port heads and intakes over from your old engine. I'd like to think you could expect a 40hp increase or so. Of course you'd want to consider upgrading to 8.8 rear diff and bigger half shafts, along with the possibility of making the tranny a bit stronger. But non of that is necessary, just recommended.
1988 Notch Mustang: - 438W, direct port n2o, t56
2003 SVT Focus: - SCT X3 tuner