Any particular valve stem seal kit I need?

[Dino]

I'm doing some engine work, getting a Crower 271hdp cam & comp cam #911 springs.  346 heads.  Which valve stem seal kit would be recommended?  Daily driver deal, no racing, only the occasional punch from a stop.

[BSB67]

I'm doing some engine work, getting a Crower 271hdp cam & comp cam #911 springs.  346 heads.  Which valve stem seal kit would be recommended?  Daily driver deal, no racing, only the occasional punch from a stop.

Have they been machined for seals or untouched factory originals.  If the latter, I don't know if there are options.

[Dino]

Untouched factory originals. 

[BSB67]

They all look the same, but don't know if there are good ones verses not so good.  I just threw away two new sets of these on Thursday that I would have sent to your for nothing.  Kinda funny. 

[Dino]

Hilarious

So do I need umbrella type seals for the exhaust or the ones that look like the intake seals?  Anyone have a part number?  I don't know what to look for here.

[BSB67]

The exhaust are short umbrella type

[Dino]

Thank you

[John_Kunkel]

With umbrella seals, I'd use silicone...they seem to survive heat without becoming brittle.

[BSB67]

With umbrella seals, I'd use silicone...they seem to survive heat without becoming brittle.

Good to know.  Brittle is the issue.