Those are not stock guide tops, they have been cut for positive seals.
As posted its hard to tell by a photo if they have been cut to work with .500" or .530" seals.
I would use Comp Cams 518-16 seals if your guide OD is .530", or 517-16 if they are .500" in OD.
With either of these seals ditch the factory O rings in the trash!
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
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