1.50 is working fine for me. Although I've had the same copy for years now so I may have a diff. variation of 1.50.
The only Issue I have is with opponent sound online. I have 2 drift cars both with Kunos swaps. one a 2JZ, the other a VR38DETT. the swaps work perfectly, the audio is perfect in cockpit & exterior. however when I use one car and my friend uses the other, we can't hear eachother.
other than that, definitley a top 5 mod for AC.