hi all as been  new to this game, i need help to work out my speedo gear!i have a 253 v8 motor and behind that i fitted a m20 Holden box 4 speed (one toner box) and my diff ratio is  2.78 and i'm running on 225/50/14 tyres ;what is the right speedo gear colour for this!!! i think the diff i fitted was for autos? allso my running combo will this be suitable or is the diff to tall at 1/1.

hi i'm new to this and i need to know what speedo gear i need to run in my car. i have a 253 with a m20 gear box with a 2.78 ratio diff and 225.50.14 tyers.i think the 2.78 center was fitted to a auto  can any one help.

hi i'm running a 308 with a m20 box with a 2.78 diff and 225/60/14 wheels. havn't had on road as still rebuilding car. do you think iv e gone wrong on my gearing Or will this good running combo as im honesty not to sure. New to this.