Jim, your 8 cwt has the longer 2A1 box so it uses a different style of top hoops. Here's an original setup on one. 
Top bows
And here's the link to the thread with lots of 8 cwt pictures. You'll find a period picture of one with the canvas in place on this thread too. If you aren't pressed for time, I'll get back to the place with that truck in the next month and I can take measurements for you.
 8 cwt pictures
		 
		
		
		
		
		
		
			
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				1940 Cab 11 C8 Wireless with 1A2 box & 11 set 
1940 Cab 11 C8 cab and chassis 
1940 Cab 11 C15 with 2A1 & Motley mount & Lewis gun 
1940 Cab 11 F15A w/ Chev rear ends 
1941 Cab 12 F15A 
1942-44 Cab 13 F15A  x 5 
1942 cab 13 F15A with 2B1 box 
1943 cab 13 F15A with 2H1 box 
1943 Cab 13 C8A HUP 
1944 Cab 13 C15A with 2C1 box 
1943 Cletrac M2 High Speed Tractor 
MkII Bren gun carrier chassis x 2
			 
		
		
		
		
		
			
				  
				
					
						Last edited by Hanno Spoelstra; 20-04-21 at 12:40.
					
					
						Reason: link fixed
					
				
			
		
		
		
	
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