Walt,
I'll take a stab at it, as much as I can.
65 = 1965
4 = Buick Division
44 = Skylark Series
37 = 2 DR hardtop
FB = Built in Flint ( should be an " H " in the VIN)
158 = Black interior
Y = Bambo Creme exterior color
A = Black top
W = Tinted winshield only
O = Painted top with contrasting color
2nd group
X = Automatic transmission
G = Console for automatic transmission
P = Not sure, might be clock
R = Not sure, might be rear speaker
3rd group
H = Wide beltline trim
4th group
F = Driver's side remote control mirror
S = Not sure at this time
5th group
K = Door edge guards
W = Custom seat belt retractors
How I do? Can you verify the options? I'm a little confused, was this not a 4-speed car? Was it converted to a 4-speed at some time in it's history?
John Egel