Greetings ,first time here so hope I'm doing it right.

I have a british Ford D300 truck fitted standard with the 240 which Ive just replaced with a recon 300. Vehicle weighs approx 5.5 ton.Motor is standard apart from electronic ignition,headman headers,offenhauser d/p and 390 holley.I'm looking at reconditioning the 240 head with larger valves and roller rockers that I already have.
Seeking advice on optimum valve sizes to improve torque and can anyone tell me what approx c/r I would end up with if put on the 300. sorry know nothing about the specs of the reco 300.

Regards and thanks .Steve

 

Go to the fordtruck website (Ford Truck Enthusiasts), go to the forums, scroll down to the engine section and click on the 240-300 section. You will find some very helpful and knowledgeable people there about the 300.