Hey guys, I decided after pondering the question in my mind that I am going to trade my '99 GT in when I get back from overseas and am curious as to what everyone thinks should be my next 'Stang. I DO know however that I am going to stick with the years '01-'04. Not really sure if I want a Cobra or Mach 1 cause it seems that only being able to run "premium fuel" would be a hassle as not every gas station has it. For instance the one here on base only carries 87 or 93, I just put $10 worth of 93 in my GT yesterday and after driving to Taco Bell (mmmmm ) and back home my GT was bitchin' at me with it's low fuel light. Normally $10 worth of 87 lasts me a couple of days before I have to refuel so the "premium" thing SEEMS like it would be a constant headache and empty wallet with a 4-valve (not to mention a SC one ala-'03-'04 Cobra). If you own a 4-valve what is your experience like gas-wise with it? Another issue I am trying to clear up is what are the pro's/con's of moving over to a 3650? I don't mind my T-45, but I always hear how the 3650 is nicer.....I never had the chance to drive one so I don't know what the fuss is about. Also, what are the real differences between a "Romeo" 2-valve and my Windsor 2-valve? I'm not a noob when it comes to 'Stangs, I just need some outside input from you guys....it helps. A supercharger would be cool...but I REALLY need a "Daily-Driver" and am not sure if it would be worth the hassle. As far as Horsepower is concerned my "ideal range" is 325-400, and is it possible to build a 400 horse N/A SOHC 4.6? Man, this is such a pain constantly tossing specs around in my mind all day and night.....it makes my Ambien stop working. . I pretty much said screw counting sheep and always falls asleep with a "Spec sheet" in my brain. Basically to explain briefly what I would like to build is this: 2001-2004 Mustang GT Coupe (N/A), (Sonic Blue, Black, OR Oxford White and the only Interior color being Black) 5-speed, Bullitt Side Scoops, Carbon Fiber hood, Carbon Fiber trunk lid (wingless), '03 Cobra front & rear bumpers (Rear having "COBRA" shaved) & side skirts (I just like the look of 'em), lowered via Eibach Pro-Kit, Y2K Cobra polished 18x9 wheels, Alum. driveshaft, 3.73's or 3.55's, Moser axles, GMS diff cover, MSD COPs, Typhoon Alum. intake & plenum, C&L CAI with a K&N filter, bigger MAF, SCT 4 Bank with coin switch, SPEC stage 2 clutch, Steeda double Hook Quadrant, SPEC Billet Alum. Flywheel, BBK or Ford Racing Shorty Headers, stainless O/R X-pipe, another set of Flowmaster mufflers (except stainless this time), Steeda bolt in roll cage (MAYBE), front & rear strut bars, 4 bolt caster/camber plates (billet steel), and a few other odd's & ends......basically about 100 more bolt on's LOL. With what I'm planning so far does this sound like these changes to a stock GT would yield anything that a stock 4-valve already has? Excluding the '03-04 Cobra....I'm not really looking to S/C right now, if ever. I just always felt there was something really classy about naturally aspirated horsepower......kind of like how anabolic steroids will show significant gains muscle wise but basically the extra muscle is kind of "fake" metaphorically speaking. Let me know what you guys think, any changes or additions you'd make to my list and serious reasons why would be greatly appreciated! Peace! I gotta go to sleep, going to watch some fighter jets tomorrow at an air show!