T16 Main bulkhead

[mudeng]

I am sending a couple of shots of the T16 main bulkhead, showing the air inlet.
On one the oil coolers are mounted on raised brackets, the second shows them mounted just above floor level. The bulkhead on one has sliding grills, (as per the IPM), and no backrests.
The second has back-rests, and no sliding grills.
Do these represent the MkI and MkII?
My references quote the MkII had the front bogie moved back 6 inches, the rear bogie moved back 9 inches. The rear bogie was also "reversed" a la Windsor. The rear drive was also placed 8 inches further back. Ground contact MKI 71", MkII 77".

Does anyone know when the MkII was introduced, from census number??????.

Any help would be great as there are plans to bring out a kit of the T16.

George