Originally Posted by cobalt327
I'm guessing "89" is the cost.
My take on the retainers is that, yes- they are used w/8mm valves. But as long as the ID of the retainer (where the locks sit) is the same as the retainer for the 11/32" valve (we know they're both 7º), the retainers will work fine- provided you use the 11/32" locks and not try to use the 8mm locks.
This question also came up in THIS
thread, although it was never really answered. But if my theory isn't correct, Spin would have surely dropped valves by now- provided that he has actually run this engine.
I'm pretty certain the ID is reduced for the smaller valvestem diameter, it is on all aftermarket 8mm retainers I can find, AND it is on the stock LS retainers. You could assemble it with 11/32 locks and incorrect retainers, it would just drastically reduce your installed height.