Actually, I'm thinking the CJ's used Low Riser heads, not mediums. I can look it up, but I'm pretty sure about that. But, yeah, it's a mystery to me. The big blocks do have more torque, and that's a real good thing in a drag race and for torching tires. The numbers don't lie though. I'm about to redo the combo in my 67, and it's disenheatening to me to think of the money I'm going to have to put into it to get on par with my late model. I guess it's the price you pay for nostalgia.
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