[A26B]

Originally Posted by Jagdpanzer

The valves I have from two sets of later style heads all the intakes measure 4.018"+- however, the exhaust valves from one set measure 4.057"+-and the other set 4.070"+-
The extra length appears to be above the stem retainer groove.
How do the valves from earlier heads measure?

I measured 107 90~92 Exhaust Valves awhile back. Overall height is 4.070 +- 0.003".

I have only had a few new late style valves, so never measured enough to get a good number.

It looks like the 4.057" valves were probably correct late style for the head, but the 4.070" were most likely early length installed in late style heads. Kind off like the carry over early transmission into some of the 1993 cars.

I came to the same conclusion that the difference is above the retainer key groove.