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enough retainer to seal clearance?

1K views 3 replies 3 participants last post by  Plaintoast 
#1 · (Edited)
So I have measured out the clearance on my vortec heads using the type seals shown below and have come up with this.

The intake valves have 18/32's or .5625" travel before the retainer will hit the seal.

The exhaust valves have 16/32's or .500" travel before the retainer will hit the seal.

I have read somewhere that these seals cannot be ran on these heads without machining the guide boss. Is this true?

And if I can use these type seals will I have sufficient enough clearance to run an XE262 cam which gives .462/.469 lift.
 

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