Paul,
Yes you are quite correct, the above Ram is one of the first 247 that were built with the Wright R975/EC2. The exhaust and air cleaner arrangement changed at the same time as the change to Continental R975/C1 engines. However by that point in the war it is very likely that tanks of this age that had mostly been used for training in the UK, would have had the engine changed, possibly more than once. It would be very easy to exchange the exhaust manifolds as the fittings are all the same. No change would be needed to the inlet side as the carb is externaly identical so the intake pipes would plug straight on. One of the good things with this family of engines is that many parts are interchangeable across different versions so engines could be updated to some extent.
David
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