Hi from the NSW mid north coast not sure how to navigate this site but here goes. Currently hit a wall trying to iron out a few issues with my dash as the previous owner had done a chev conversion from a petrol patrol and hasn't sorted things out, the old petro tacho has never been connected and the speedo goes heywire more often than not so ive bought a diesel cluster in an effort to sort it out. problem is the diesel model speedo works but not smoothly or accurately i do not know if there is compatibility issues between the year of manufacture of the model ie 91 GQ any info greatly appreciated