caperix

Can't you modify the arm pivot to allow more spring travel for a given wheel movement. This could have some benefit on a low z car that has very little suspension travel.

Ok so you got everything figured out, sorry I though you were still having issues.

So just to clarify, as your first post says you bought factory replacement brake discs for a 75 280z. You are installing a msa rear disc conversion kit & the recommended 280zx rear rotors do not fit over the hubs. You have confirmed part numbers & tried multiple sources. It sounds like you are getting front rotors, can you post a picture?

With that kit you need to order 1982/83 280zx rear brake rotors, raybestos 9809r.

So you are working with rear not the front? S30's never came with rear disc so that may be your issue. You need to figure out what rear brakes were installed.

Does the car have any driveability issues, or over heat? A compression & leak down test or a coolant co2 test will give you a better idea what is going on with the engine. Oil can get in to the coolant at the intake gaskets as well. Rebuilding the engine in it will be cheaper than any swap, so unless you have the time & money to redo the wiring, fuel system, driveshaft & exhaust I would keep the sbc.

The latter cars can have just the pedals swapped in. I did that on my late 74 260. There are a number of different pedal boxes used throughout the years that you will need to match pedals to for correct fitment. There are a few threads on this site as well as Classiczcars that brake down the changes by year.

I priced the coil over tubes & bearing adapters through ttt. It looks like just those parts would be $1040. & would still likely need custom length axles.

Always good to have more pictures of this swap. Have you decided on how you are going to do the filler neck? My tank came with a f body filler & it looks like I could mount it in the factory location with a little work, but the angle may make fill ups difficult.

What about using the t3 uprights for the newer bolt in wheel hearings with the long nose r200? That would get rid of the weak link stub axles and let you use cv axles with out adapters. Apex used to list a similar part on their website, but I no longer see it separate from their full rear setup. I don't know how much just the uprights would be but I would think it would be cheaper than chrome molly stub axles & cv adapters.

As someone who bought an s30 at 16, the advise I would give would be to buy the nicest car you can afford. Many things will get in your way over the next few years, so smaller projects will let you drive and enjoy the car. It is good to see a new generation interested in classic cars. I hope you find the car you want & get to enjoy it.

I have not seen one in person but have read of a few being done. https://ls1tech.com/forums/manual-transmission/1933292-dct-transmission-4.html Here is someone doing a ls dct with an adapter.

The good thing is the gearbox to engine link is just a simple spline in the middle of the flywheel. As the new corvette comes with a dct that should be a source for a ls dct flywheel. As long as they all use the same spline input then you could make an adapter for the easiest to find dct. In the US the bmw 135 is a good option for a cheap dct but things may be different in Australia.

Try htg tuning for electronics. https://htg-tuning.com/. I have not heard of anyone working on a dual clutch s30 but have seen other projects using there gearbox controller. What engine are you planning on running?

Ms42 is well mapped at this point, so you could remove ews your self. Here is a site with tuning info. https://www.ms4x.net/index.php?title=Siemens_MS42