kaninja
3.73 differential gears will be one of the biggest improvements in acceleration you will make.  Having the AOD combined with those stock 2.73's or whatever, man it must be a dog.  My GT with the stock 3.27's was bad enough with a manual, a can't imagine 2.73's and an auto.

EVGATech_DaveB
Just found this thread!  Nice, building a Fox body, im indifferent to the look which I know is 100% opinion, BUT they really have a lot going for them.  The 4link in them was great, Ford's old "let's go drag racing" rear end, but they still handled.  The 3.73's will do you really well, lower rear gears are not as necessary for engines with a lot of torque, and the SBF was just not a high torque motor, then were built for quick acceleration, however the drag of a high rear gear could be terrible on them, low gears like 3.50 and higher will REALLY breathe some new life into that car. And with an AOD, which I think was still specifically a E4OD aka a beefed up C4 with a .68 overdrive added in, your cruise RPM for the freeway will still be good.
What I liked about the older 5.0's, had a family member with a 91 Cobra R and a 87 LX 5.0, the LX was a 3.25 posi, when I drove it from OC to San Diego, I turned on cruise control at about 70-75mph and it still got like 26 MPG, those little cars really did have a nice balance of power, handling and enough economy to really use the car if you can control your right foot  :p  The next time I took that trip I got like 16, but the round trip was about an hour less hehe.... hence control of the right foot.
 
I am not going to turn this into a shameless plug, however, I know someone who has a shop and is in the performance industry (has been for over 20 years), from mild street rods to Alcohol and Nitro (Nitromethane) strip only builds, and he is a major SBF guy, if you are interested, drop me a PM and I will get you contact info.
 
Also, for your bouncing speedo issue, I have had that happen in old vehicles and some restos I have done where the car sat for a long time, it is usually the speedo cable itself, it start sticking to the sleeve its in.  The speed is usually the average of the highs and lows it swings to.  Sometimes I have seen the problem work itself out, just needs to move often again, others the cable needed replacement.
 
For the oil leak, unless you already know where it is coming from, I recommend doing a pressure wash on it, or a coin-op car wash and really clean the engine.  This way you can see where the oil is coming from, being clean makes it easy to spot.  Many times it is the cork valve cover gaskets, if you still see staples in the tops then they are original and likely part of the source.  If it is the pan that can be tricky, but SBF's are unskirted blocks and not a large crank, so you can remove,/clean/reinstall the pan or flat out replace it if it is dinged up fairly easily.  Only real fugly place it can be is if you see it coming out from the bellhousing area, that means rear main seals are leaking and you gotta drop the trans for that and that can be a PITA. 
 
Anywho, I'm now subbed, and following this, get more pictures, especially ANYTHING you do to the suspension or drivetrain.

HAZMAN_THE_GREAT
Hey Balto what do you think of this guys Fox Body Stang in the video down below? I have been following up on his progress and looks good. By the way before all the mods and tuning he currently is putting on, Matt did run his Stang bone stock on a circuit track to see how it preforms in a previous video. After all the mods are complete he plans to race it again at the same track so then we will see what kind of performance increase he gets based on the mods he put on.
 
 
 
 
 
 
Here is the video down below where he did the bone stock track test.

kaninja
Balto, just get a 4 wheel disc brake conversion from a Cobra kit. You will then have 5 lugs and lose the pony rims. However, I urge you to check out the FR500 rims in black chrome....best aftermarket rims for the fox IMO.

kaninja
Yes, I will send you links to good parts for the suspension. Not a tonne of stuff is needed to make the suspension way better.

Baltothewolf

HAZMAN_THE_GREAT
Hey Balto what do you think of this guys Fox Body Stang in the video down below? I have been following up on his progress and looks good. By the way before all the mods and tuning he currently is putting on, Matt did run his Stang bone stock on a circuit track to see how it preforms in a previous video. After all the mods are complete he plans to race it again at the same track so then we will see what kind of performance increase he gets based on the mods he put on.
 
 
 
 
 
 
Here is the video down below where he did the bone stock track test.

I have a track I do around my neighborhood that's similar to that, and pretty much all of his complaints are my complaints. I swear the car steers like a aircraft carrier, the brakes start smoking and get extremely mushy in 1 lap, but it feels solid other then that. I wonder if there is a way to upgrade the brakes and steering without getting rid of the stock rims. If not, they may have to go, and that would be a shame because I will never be able to get used to any other type of rims on the car. Also his is a notchback, mine is a hatchback. 

Baltothewolf

kaninja
The 331 stroker sounds awesome. The Cobra intake is a great choice, although you may have trouble finding one as they are disco'd and Ford, Summit, Jegs, American Muscle, etc. have no stock. You can get the lower and upper intake manifold off an Explorer which has the same flow rate as the Cobra as it has the same runner design as the Cobra, it just looks different as it was designed for Mass production.

Now the heads. Please learn from my mistake and stay away from the Ford GT 40 heads. Yes they are a somewhat decent improvement over stock, but there is so much better available for close to the same price. I had aluminum GT40 heads and was disappointed with them out of the box. I paid money to have them ported and I gained only like 15hp......I think the best I could get with those heads was 270hp at the wheels. Then I got fed up and threw on fresh Trick Flow heads and without changing anything else my very first dump pull was 318hp. The kicker was that the Trick Flow heads only cost $125 more than the Ford heads.

So, I recommend Trick Flow Twisted Wedge heads, or AFR185 heads. Especially with a stroker motor the Ford Cobra/GT40 heads will choke the extra cubes even more.

Also, whatever intake you get make sure to send the lower to TMOSS for porting.

AFR 185's are almost 2 grand holy crap! That's gonna take a while to save up for haha.

bill1024
I have the GT40-X heads with the e-303 cam and the motor is rated at 340 HP
There are several GT40 heads Y, X, and Z I think they work just fine. I would think the Z head for a 331 stroker.
I bought the Ford racing GT40 306, crate motor rated at 340 HP and 310 torque if I remember right.