So I got a 65 fastback and 2001 bullit with a cobra engine swap. - Vintage Mustang Forums
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post #1 of 12 (permalink) Unread 05-16-2019, 05:21 PM Thread Starter
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So I got a 65 fastback and 2001 bullit with a cobra engine swap.

Got these two and planning to make one cool cat out of them. Fastback with a 2001 4.6 Cobra drive line. Missing the IRS but I plan to fit the 8.8" lsd from the bullit in it and look for the irs down the road. I know the shock towers need to go to make room for the mod 4.6 and will put in the coil overs and rack and pinion in while I'm at it. I have many questions:
What is the best front end kit for such swap?
Rear end kit for the 4 link 8.8"?
subframe connectors a must?
This is just for the starters. Not new to cars obviously but new to such involved restomods. I appreciate any help very much.Here are some pictures
Attached Images
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File Type: jpg local 65-8.jpg (28.8 KB, 84 views)

Last edited by jacek; 05-16-2019 at 05:27 PM.
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post #2 of 12 (permalink) Unread 05-16-2019, 08:33 PM
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I used a 2004 Mach 1 as a donor for a Factory Five Cobra, virtually the same drivetrain as in your 2001 Mustang Cobra. Regarding the front cross member and shock tower delete items, there are many solutions out there. You can search this forum and look at the Coyote swaps that have been done or are in progress. I am restomoding a 1970 Mach 1 with a Coyote now and I used the TCP full length front clip with their suspension, PS rack, sway bar, and Wilwood 13" front brakes. Not a cheap solution as their spindles did not accommodate Ford rotors and calipers. Given you have the 2001 donor, you may wish to look for a system that will accept the Ford dual piston 13" front brakes, this will save you cash and will be a good set up for the 65 fastback. If you can find a 8.8 for the rear, you can run 11.75" rear disks, again a good match for the 65. I also used the TCP 4-link for the rear of my car. Again an expensive solution but I wanted a vendor match front and rear. Regarding subframe connectors, I would highly recommend them. Take a look at the subframe connectors from SpinTech. Several builders here, including myself, are using them. They fit up tight to the floor and look more like factory items. They also are stitch welded to the floor along their length, making them and the floor of the Mustang more of a unit. As said before, there are a lot of solutions out there, I suggest you look at Street or Track, MTF, Heidts, and others. There are so many options now, you may find you will be doing research for quite a while.

Also regarding the 4.6 from the donor, you are going to need to reprogram the PCM to flash out the PATS at a minimum. Don't even think about trying to get the engine to run without removing the PATS. Although it can be done, it is a major PITA. Having a complete donor where you can strip out all the electronics and wiring harness is a big plus.

If you have specific questions, you can PM me and I will answer as best I can. Take a look at my build thread for my Mach 1. I documented the install of the TCP front clip.

Good luck, looks like you will be having a lot of fun with your build.

Alan
1970 Mach 1 Coyote powered restomod in progress. Started 10/2016.
http://forums.vintage-mustang.com/bu...mod-build.html
2017 Mustang GT AT donor purchased 9/2017.
FFR MK4 sold 3/1/2018.

Last edited by Boss5Oh; 05-16-2019 at 08:35 PM. Reason: Added information
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post #3 of 12 (permalink) Unread 05-16-2019, 09:14 PM Thread Starter
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Thank you very much for your help,
The mustang brakes are definitely something i want to look into. Here is a crazy idea I had- what about cutting out the whole rear floor section from the Bullit that the suspension attaches to and grafting that into the fastback? Has that been done? The first thought is that it would probably be too much work with questionable structural integrity which is imperative for safety. But..... I'm still in planning stages so it is a thought.... Are the rear subframes for the 4 link with the 8.8" from the bullit relatively straight forward to install?
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post #4 of 12 (permalink) Unread 05-16-2019, 09:58 PM
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post #5 of 12 (permalink) Unread 05-16-2019, 10:02 PM Thread Starter
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Thank you,
I'm bracing myself for a long haul here....
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post #6 of 12 (permalink) Unread 05-17-2019, 12:47 AM
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Pretty sure that 8.8 is going be WAY too wide for the 65.
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post #7 of 12 (permalink) Unread 05-17-2019, 01:24 AM Thread Starter
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Wide body- anyone? I seem to recall the width is 63" disc seat to disc seat
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post #8 of 12 (permalink) Unread 05-17-2019, 07:55 AM
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If you want to use the front brake setup, AJE and Griggs Racing both make setups that allow you to utilize SN95 spindles. There may be others. I happen to be using the Griggs (pricey setup) and a set of Cobra brakes on my 65 with Coyote build.
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File Type: jpg 20170801_201717.jpg (398.1 KB, 0 views)

Coyote build in 65 GT Fastback in body work https://forums.vintage-mustang.com/b...e-powered.html and on Facebook @65gtmustang
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post #9 of 12 (permalink) Unread 05-17-2019, 08:19 AM
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Quote:
Originally Posted by jacek View Post
Wide body- anyone? I seem to recall the width is 63" disc seat to disc seat
Explorer 8.8 narrowed down on the long side (left) by about 2.75" and use another short side (right side) axle, and it's about perfect. Stock 8.8's are too wide as is unless it's a '67 and up car.

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post #10 of 12 (permalink) Unread 05-17-2019, 09:06 AM Thread Starter
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Quote:
Originally Posted by Huntingky View Post
If you want to use the front brake setup, AJE and Griggs Racing both make setups that allow you to utilize SN95 spindles. There may be others. I happen to be using the Griggs (pricey setup) and a set of Cobra brakes on my 65 with Coyote build.
Thank you, that looks gorgeous. I'll check that out for sure. There are so many good parts on the bullit and I'm a stickler for parts recycling/efficiency.
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post #11 of 12 (permalink) Unread 05-17-2019, 09:17 AM Thread Starter
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Quote:
Originally Posted by gt350sr View Post
Explorer 8.8 narrowed down on the long side (left) by about 2.75" and use another short side (right side) axle, and it's about perfect. Stock 8.8's are too wide as is unless it's a '67 and up car.
Thank you. I read the 8.8" explorer swap thread but my goal is to use Cobra IRS eventually so the 8.8" LSD from the bullit is an intermediate solution until I find a deal on the IRS. Hence the body width has to be adjusted to accept the IRS. Also well done flares in the quarters look killer on this car IMO. Sort of a modern take on a 66 GT 350R with the 4 cam motor. That's my loosely defined goal...
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post #12 of 12 (permalink) Unread 05-17-2019, 11:52 AM Thread Starter
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I also plan to use the bullit 18" wheels from the donor car and set the stance right so the bottom of the rockers is no more than 6" off the ground. I'm pretty sure that will require cutting bigger wheel arches into the quarters and fenders so it opens up whole new set of calculations. In addition I probably should get drop spindles and mount the rear suspension 2-3" deeper into the body to maintain good handling geometry? Has this been discussed here?
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