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			The obvious solution would be to fit the 330cu in (5.4 litre) Bedford diesel engine. 
106 HP @ 2700 RPM and 238 lb/ft torque. 
 
Another reliable engine and freely available - it was the standard option for your vehicle. 
 
Top speed might be slower due to lower governed speed of 2700 RPM (300cu in petrol is 3400 RPM) but hill-climbing shouldn't be affected.
		 
		
		
		
		
		
		
		
		
	
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