If you're looking for power go with the 270s big brother 302. It was a good truck engine. 
The 261 is a higher rpm engine than all the others and hence has more zip. A good 261 could handle a 283 V8 in a similar sized vehicle. I have 3 or 4 261s that need overhauling. They're a direct replacement for a 235.
		 
		
		
		
		
		
		
			
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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
			 
		
		
		
		
		
	
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