pr3-3?
pr3 head is b16
pr3-3 and pr3-4 are casting numbers. No difference between the two. BTW the number on the left is the year the head was produced. Mine reads 9/0. Also look for green dots around the dizzy area. This means is was one of the better castings and therefore is an itr head.
pr3-3 and pr3-4 are casting numbers. No difference between the two. BTW the number on the left is the year the head was produced. Mine reads 9/0. Also look for green dots around the dizzy area. This means is was one of the better castings and therefore is an itr head.
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