2.02 is just a valve size there 461's 461x 492 and whole bunch of others. Also some heads can have 2.02 up to 2.08 put in them. If your loooking at a set of heads give the guys here the casting # and we can tell yah what yah got.But be warned if your not gettin them almost free go buy a brand new set. Figure out how much you need in the chamber also(CC's) cause unless you want to run race gas @5-6 bucks a gallon you dont want a 12 to 1 motor with 60 -64 cc's in the head. Yell back you will get lots of help on this one we all have done this a time or 2. LOL
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