This one popped into my head while exercising at the gym today.
Get an older SN95 V6 Mustang, and put the newer V6 Cyclone engine into it. I am not planning on doing this. I just want to hear others thoughts on the swap as an academic exercise.
A fast search of the web seems to yield "why not V8" and "totally not worth it" as an answer. I am inclined to agree, but this is GRM, and we think about oddball stuff here all the time.
It seems that this would pretty much involve building a whole new car inside of the older chassis.
For what?
Thoughts?
There's a surprising amount of aftermarket, support, and power to be made on the old V6.
Not something i'd bother with.
From what i understand, the 4.2 V6 is a somewhat common swap and a good way to piss off GTs of the same generation.
I am here to answer the question "Why not V8?"
Ford Racing sells V8 crate motors. They also sell complete wiring harnesses with computers that are direct plug and play and include OBD-II functionality.
K-members, motor mounts, and headers are also readily available for every conceivable Ford V8 you could drop in there.
So, I see no reason at all for going with a V6, unless you simply relish the challenge and doing something that no one else has done. In which case, I applaud you.
But seriously. V8.
92CelicaHalfTrac wrote: There's a surprising amount of aftermarket, support, and power to be made on the old V6. Not something i'd bother with. From what i understand, the 4.2 V6 is a somewhat common swap and a good way to piss off GTs of the same generation.
Actually, it's pretty dang hard to find performance stuff for the 4.0 V6 at this point. You can find some stuff for the 3.7 V6, though, but it's still a lot easier and more cost-effective to go with a 4.6 or 5.0 Mod V8.
Sky_Render wrote:92CelicaHalfTrac wrote: There's a surprising amount of aftermarket, support, and power to be made on the old V6. Not something i'd bother with. From what i understand, the 4.2 V6 is a somewhat common swap and a good way to piss off GTs of the same generation.Actually, it's pretty dang hard to find performance stuff for the 4.0 V6 at this point. You can find some stuff for the 3.7 V6, though, but it's still a lot easier and more cost-effective to go with a 4.6 or 5.0 Mod V8.
4.2 V6, not 4.0. 
There's quite a few 3.8 turbo Mustangs rolling around, making a LOT of power.
92CelicaHalfTrac wrote: 4.2 V6, not 4.0.
Oh, my bad.
I still stand by my previous opinion that if you're going to swap a motor in, you are better off going with a V8.
I had a buddy that turbo'd a 2000 V6 Stang. Used an HX35Y turbo with an eBay front mount intercooler, SVT Lightning MAF and 48lb injectectors. The car was had a 4R70W auto that we did the J-mod on. Also had 50 wet shot on it, just in case. It ran 7.6 in the 1/8th mile. I loved going hunting in that thing. Total sleeper. Nobody gives a maroon V6 Mustang a second look LOL
i swapped a turbo-thunderbird drivetrain into a plain-white '89 fox hatchback for the very same reason.
single exhaust pipe. sounded like asssssssss....
'till the boost hit.
The new v6 seems to make a lot of power when boosted.
Point of Clarification:
If I was going to do the swap, I'd do a V8 swap. However, before that, I'd just buy a V8 Mustang in the first place.
Boosted iron block V6 is a good counterargument and avoids an engine swap.
A friend of mine on a Mustang forum has a 2005 4.0L V-6 'vert with an X-Charger supercharger on it. It's making 328 rwhp/ 339 rwtq right now. It's bright red and he's added a Shelby front end among other things so it's not exactly a sleeper, but it is very quick and sounds cool when the blower winds up.
Provided it isn't too tall or wide a Cyclone V-6 might make a good import engine swap (240SX, RX-7, etc.). It's lighter, shorter, and much cheaper than a Coyote or EcoBoost. Some folks with ProChargers and a tune are safely making anywhere from 475-550 hp. The Cyclone can handle about 600bhp before the pistons shatter into a million tiny pieces. The MT82 shifts nicely and the engine is somewhat peaky (it's happiest over 4,000rpm thanks to VVT). Dare I say it's almost... Honda-like? 
EDIT: I found the thread from the guy who found that engine limit (which was actually about 650hp!). Check out pages 9 and 10 for photos of the carnage:
http://www.allfordmustangs.com/forums/2011-v6-mustang-tech/340335-important-read-3-7l-limit-found.html
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