Wilwood brake install 1975 dart
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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https://www.manciniracing.com/hyd292292dur.html
this is the cam I’ve got in it
You can fit 275's on the front of your '68 Dart if you run 18" rims. You need about 6" of backspace to do it with the 73+ brakes, other brake packages may change the track width which changes the backspace needed. In the back though you won't be able to run anything that wide. Dusters/Demons/Dart Sports/Barracuda's are about 1" wider in the back than Dart's are. With the stock spring locations about the most you can do is a 255, and even that's a stretch on some of the pre-'70 Darts. If you run a 1/2" spring offset kit you can run 275's. Bigger than that requires a full 3" spring relocation and mini-tub.
The T56 is a TON of work. New crossmember, new transmission tunnel, lots of fabrication. Plus almost $7k the way I did it with a brand new transmission. My T56 install is covered in my build thread, as is most of the stuff I've done to my car. Page 12 pretty much takes care of the T56 install
My "new" '74 Duster- or why I need a project like a hole in the head
That one should actually be more streetable than the other one I thought it was. I still don't think that's a good candidate for a daily driver, but for a weekend car that would be manageable. If your compression really is 10:1 though it will be harder to go to a smaller cam if that's something you want to do because 10:1 is pretty much the max for pump gas, and if you go to a smaller cam you could end up with detonation. I have a few degrees of timing pulled on my engine to keep it happy with the 91 octane blends here. There are ways around that (thicker head gaskets being the easiest) but it depends on what your plans are.
Alright so rim size I can only really go 17x7 or 18x7 in the front and 17x8 or 18x8 In the rear? I read up on the t56 and saw your thread I see it’s a lot of work I’m not sure if I’m ready to do as of now my goal is to make it into a street car but I still want it to be pushing more or less 400 hp which from what the former owner told me is what it’s pushing now but I also want to be able to go on cruises on the highway and not have to worry about the car sitting at 3500 rpms so yea that’s something I’m going to have to figure out whether I should sell the engine and tranny and start a new build or learn to work with what I have but I also want the car to have a good lowered stance and handle decently I know these cars weren’t necessarily built to handle but I’m sure eventually I’ll get to a place where I could feel comfortable taking corners it’s definitely gonna be a weekend/ week night car for now
