YS3 AB 35J X H1234567
Classic 900
4th digit [A] as above = 900
6th digit [2] =2 door [3] as above =3 door [4] = 4door [5] = 5door [7] = convertable
7th digit [4] = 4speed [5] as above = 5speed [6] = auto
8th digit [c] = carb [d] = 16v [e] = turbo 16v [j] as above = inj8v [s] = turbo 8v/LPT 16v
10th digit F = 1985 G = 1986 H = 1987 as above up to Y = 2000 then 1 = 2001 etc
9000
4th digit [C] = 9000
6th digit [4] = 4 door [5] = 5 door [6] = 5 door CS
7th digit [5] = 5 speed [8] = auto
8th digit [B] = 2.3 inj [J] = 2.0 inj [M] = 2.3 turbo [N] = 2.0 turbo [P] = 2.0 lpt [R] = 2.3 aero turbo [U] = 2.3 lpt [T] = 2.0 turbo [W] = 3.0v6
10th digit = year code as above I hope that is of some use to you all, if you want gm 900, 93 and 95 let me know, Tom.