I think that's during it's Amal carburettor period...
Four motorcycle carbies all in a line, and as you can see the exhausts sweep over the top of the head to the other side to give room to move.
Leif, seeing as you liked that one, I've got a little treat for you (I know Geoff wouldn't mind and I don't think John will either):
:
So you can see how it was all set up. Note also the brake cable/chain arrangement and other things. This car had a Mathis front axle mounted in an MG N (large touring car) chassis.
