[QUOTE=classiccars;48790]Hmmm M20 is an manual, so it must of been 3 on the tree then?[COLOR="Silver"]

Nope.. 3-speed is a M15. M20 is definitly a 4-speed floor shift.

Mauser

M15 Aussie 3spd (6cyl, HQ 253) -3.59:1 3.07:1 1.68:1 1.00:1
M20 Aussie 4spd Std. ratio (L6) -3.05:1 3.05:1 2.19:1 1.51:1 1.00:1
M21 Aussie 4spd Close ratio (V8) (High Perf.)-2.54:1 2.54:1 1.83:1 1.38:1 1.00:1
M22 Aussie 4spd Wide ratio (L6) One Tonner -3.72:1 3.74:1 2.68:1 1.68:1 1.00:1
MC7 Muncie -2.59:1 2.52:1 1.88:1 1.46:1 1.00:1
M40 TriMatic (L6, 253, 308) -1.85:1 2.31:1 1.46:1 1.00:1
M41 TH400 (308, 350) -2.08:1 2.48:1 1.48:1 1.00:1