Hurstmeister's Tech Write Up On The, Modular Engine Setup, To Foxbody Chassis.

[Stealth Mode]

Hurstmeister


All 79 - 04 k-members,.. stock and aftermarket tubular will interchange and bolt on with pretty much no hassles (speaking from a only bolting it to the body perspective).

How ever,..

The early 79 - 83/84 k-members are slightly narrower and the cars used longer a-arms. But since most dont have to deal with this I dont get into it.

The 94 - 04 Mustangs are still a Fox,.. even though they are designated SN95. The chassis and suspension on these cars have not changed from 79 - 04 with the exception of the IRS in the 99 - 04 Cobra's (which are also fully interchangeable with 79 - 98 Mustangs).

The problems come in with various wheels and axle widths/offsets used in these cars. 94 - 98 are wider in the front,.. but only because of longer a-arms and a longer axle length in the rear. The 8.8 housing itself did not change. The 99 - 04 have a wider 8.8 housing and use longer axles then the 94 - 98 cars as well.

You want to put a 4.6 in a fox the cheapest and simplest way possible. That would be using a 96 - 04 4.6 k-member and then using your Fox a-arms in order to keep the fox track width. Use 86 - 93 a-arms and you'll be fine. The Fox a-arms are about an inch shorter then the SN95 A-arms. Everything you want to do is fully bolt on plug an play with no hacking or modification needed.

Any 96 - 04 4.6 K-member will bolt to any other 79 - 93 Fox car and the 94-95 cars as well. But dont use the fox a-arms on the 94-95 cars. Use the stock a-arms.

As for the tubular k-members. I'm not 100% on the others,.. but I know for a fact that the QA1 and UPR both allow use of the stock a-arms. I ran stock a-arms on mine for a couple years before going to a coil over setup.

Not the greatest picture,.. but thats a QA1 with stock SN95 a-arms. Fox a-arms would bolt to it the same way. You can get most any QA1 or UPR tubular k-member for a 96 - 98 and it will bolt to your fox the same as it would to a 96 - 98. You just want the 96 - 98 for the 4.6 mounts.



Hurst

[BAMF]

Stickied per OP's request. Please let me know if it ever needs cleaning or you'd like it to be locked to prevent any other posts.

[Stealth Mode]

Will do! Thanks Nick. Figured this would be a good article, seeing as there are more and more Modular>Fox builds.

[Iraq&Roll]

Question: 4V modular into 87-93... Does this require hydroboost? Or will a manual brake master cylinder clear?
Asking because of Coyote 5.0 swap potentials if/when Ford releases a crate engine and the computer like the Hot Rod 3V.

[COBRACON666]

sounds nice but what about the wiring

[Stealth Mode]

Question: 4V modular into 87-93... Does this require hydroboost? Or will a manual brake master cylinder clear?
Asking because of Coyote 5.0 swap potentials if/when Ford releases a crate engine and the computer like the Hot Rod 3V.

Yes it does. Alot of guys are using the '94/'95 brake setups. Opens up alot of free space when swapped.

The 4V swap into a Fox ('87-'93) actually is a bit of a tight fit. The 4V is larger in size than a 460 and its obviously all in the heads. So you need to clear up as much room as possible. I have seen people at shows with the 4V swaps and mantain the stop brake booster/master cylinder but for any type of work to be done to the engine, it has to be removed.

[Stealth Mode]

sounds nice but what about the wiring

You can use the Mark VIII engine harness but when you move into the interior part of the harness a few wires have to be tweeked, lenthened and soldered. Snag you a '96-'98 Cobra ECU and there ya go!

[32vFox]

what about the PATS? how would u go by getting rid of that or bypassing it so the car will crank? or would u just rewire it into the fox? (thats if you have a sn95 donor)

[ChrisN1313]

what about the PATS? how would u go by getting rid of that or bypassing it so the car will crank? or would u just rewire it into the fox? (thats if you have a sn95 donor)

Get a chip burned and a tuner can turn off pats in the chip. Or get a handheld and have a tuner do the same thing.