See posting at https://daytona.craigslist.org/cto/d...955662697.html that says:
Need to move this so I can build another shop demo car. LS1 V8 Roadsters Miata conversion. This car was built in V8 Roadsters conversion shop. 100% professional build. V8 Roadsters conversion kit including front and rear subframes, oil pan with remote filter, radiator, dual fans, 2002 LS1 and T56 from a Camaro. CTS-V getrag rear differential with 3.23 gears. Wilwood big brake kit. Hard Dog roll bar. DSD fully adjustable coil overs. All new suspension bushings. Konieg rims. Power steering, power brakes with Wilwood big brake kit, a/c is fully functional. All stock gauges fully functional. Exhaust is super quiet. This car is a sleeper. Freshly upholstered Mazdaspeed leather seats. New Robbins top with glass rear window and defrost. 73k on car and 9k since conversion. 1/2 life on Nitto tires. The clear coat is starting to haze. That is the only thing this car needs. Exceptional in every way. I have hundreds of pictures of the entire build. No tire kickers. No free rides. No scammers. Will consider 2006-2007 NC Miata as partial trade. Auto ok. Just did 1200 mile trip to Miata's at the Gap in Tennessee. Did not burn a drop of oil and averaged 26 mpg!

 

Is it just me or I thought only the cts diff came with 3.23 gears. Please let me know.

 

The differential utilized in the CTS-V for the year (2005 to 2007?) that works with the V8 Roadster kit is also utilized in some other vehicles.
For that reason the differential assembly can be purchased with several ratios. Mine is a 3.23 but it also comes in 3.08, 3.42, and 3.73 ratio.

 

This car has been previously mentioned and listed here, and I've said it before, but I'll say it again: I drove it last winter, and it's a sweetheart. If it were an NA, I'd have bought it rather than converting the one I am now (and Al @ V8R is doing my conversion).

Cosmetically, it could use a few little things to make it 100%, but for the money, you'd be hard-pressed to do better unless you do all the work yourself.

-Matt