[GH427]

I was just wondering if anyone could tell me what drive gear I should have in my toploader. It is a HEH-CG code C/R 31 spline box with the large input shaft (originally out of a 66 Galaxie 428 I believe). My speedo input is on the left side of the box (i.e. on the drivers side if it were still in the original car). I can't get enough access to see it myself and would like to avoid having to remove the box just to have a look. Thanks in advance.
George H.