Right now the 136 is pretty good and the 141 is very similar to a 109. Now that you can use shims the 111 and 124 will be pretty good but they are .320 deep and have to be cut about .040 to get cc's right.
I don't think the 109 was ever the best...it was good all around...not the best...
So far we have had excellent findings on the little older jt 123 heads...
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