I had that problem as well - Remove the side plate, modify for clearance then refit.I have just tried to install one of the new style A22 SS drain plug/banjos on my C Comet but it fouls the R/H FT23/2 engine plate. Is this normal because I can't see it going in without removing metal from the engine plate? Anyone had the same problem or is just me???
Martyn (sorry about pic quality)