i just did a turbo swap going from 91na to 93t. so i got a 93+ usdm dash harness to use with my jdm cluster. will that not work? do i need a usdm cluster? also... everything on my na cluster works except the speedo. is there someway to modify my na speedo to work? i know 91-92 had mechanical speedos and 93+ had electronic... just wondering if i can somehow modify my na. thanks!