Help identify MK II pics

Hi
Ive been looking through some of my GT40 pics, and Ive found these,I believe the first two are of a MK IIa,.... but later upgraded with a MK IIb dash...

The third pic appears to be a MK IIb, because it doesnt have a central tunnell, but the dash appears to be from a MK I

Can anyone give any information on these pics. My knowledge of these cars may be totally wrong.......

Mick
 

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The first 2 pics are of a tennant tub built into a copy of 1047 in the 80s by Bryan Wingfeild and sometimes known as 1047b and vintage raced here in the US and the last pic is not an original type car
 
The first 2 pics are of a tennant tub built into a copy of 1047 in the 80s by Bryan Wingfeild and sometimes known as 1047b and vintage raced here in the US and the last pic is not an original type car
 
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