Trying to convert a track car back to the street can be complicated. Is this your cam?
https://www.summitracing.com/parts/cca-20-672-4
If it is, then I'm sure you're finding that a 292/299 duration cam with a 3,000-6,600 power band and a 3,800 stall convertor isn't super street friendly. But depending on your engine's compression ratio it won't be so easy as just swapping the cam and convertor. Going to a smaller cam might cause detonation, so then you'd have to look at possibly lowering the compression ratio. Like I said, it can get complicated. Then there's the reverse manual valve body, which isn't exactly daily driver material IMO. Honestly, you'd probably be better off starting a whole new thread on what to do to make that engine more streetable.
And it really depends on what your goals are. My Duster has a 276/284 duration, .513/.533 lift cam with a 9.8:1, .060" over 340. I ran it with 3.55 gears for awhile, but those weren't really enough. So now it has 4.30's, but with a T56 6 speed transmission so I can still run around on the freeway. Even my engine is a little hot for how I use my car, which is my daily driver. For a weekend car it would be awesome, but as a daily that sees commute traffic it can sometimes get to be a little much. Not enough that I'm going to change it though. But you see the point, what works great on the track isn't so great on the street, what you can get away with on a weekend fun car is different than what you want for a daily driver, etc.
Suspension is the same, you probably have small torsion bars and really stiff rear springs. Which is great for a track only set up. But on the street it means piss-poor handling, which isn't good. But depending on what you've got now it could mean replacing a lot of the suspension components you have. Again, it depends on what you want. If it's street/strip you'd want something different than if you want to make it a corner carver. You could get a whole giant thread going just on suspension too. Or you could start your own build thread and work on all the different topics there.
As for the DoctorDiff Cobra style brakes, I really like them. They use the Mustang Cobra style PBR calipers with a C5 Corvette rotor and aluminum hub. All the parts except for the hub are from production cars, so, tried and tested and readily available. I run them with DoctorDiff's 11.7" rear disks, with 275/35/18's up front and 295/35/18's out back. I've had them on my car for about 6 years now, never had an issue with them.
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