Hi Alex, I'm not sure because the pipe will go right in and half block the inlet. 
maybe the two clamp plates for the pipe guards under the floor are enough to locate the pipe. I have thought about tacking an extra piece of tube to the outside of the pipe that will butt up to the casting, or a stop either side of one of the clamp plates.
		 
		
		
		
		
		
		
			
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				Bluebell 
 
Carrier Armoured O.P. No1 Mk3 W.  T84991 
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. 
Dodge WC55. 37mm Gun Motor Carriage M6 
Jeep Mb #135668 
So many questions....
			 
		
		
		
		
		
	
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