3.23 gears and speedo cable

Hello everyone, first time post here!
I Have a 68 barracuda fb, Man, no one sells 3.23 only 3.55. I now have 3.91 and can safely run about 47mph. Engine rpms sounds like running about 3000-3500 ANYONE know who sells a 3.23? Would love to take a day trip every now and then on the hi way,lol

Also 318/904 from an 85 fifth ave, the 85 cable doesn't have the slip on style for the 68 speedo, it has a screw on!
The 68 cable doesn't have the slip in with retainer at the 85 trans end, it's a screw on