Re: Big Block Head Casting Numbers
Not so fast. First I believe you have the number wrong. You also need the casting date to tell what year they were made. From MORTEC.com:
3993820....71-84...oval...OPEN...454 Passenger and Trucks, 113cc chamber, 255/114 ports
3993820....71......oval...OPEN...402, 113cc chamber, 255/114 ports
I never make mistakes, but on occasion I present myself with an opportunity to get very creative.
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