Aluminum valve cover PCV
What do I use here? Has anyone had luck with the aftermarket pcv/breather combo you find on summit?
Spectre Performance SPE-4284 Spectre Performance PCV Valve Breathers | Summit Racing
Or something a little fancier
Summit Racing SUM-G3408 Summit Racing™ Diecast Aluminum Breathers | Summit Racing
My original though was to use the stock style that mopar used in the early 60’s, but apparently the valve itself was discontinued and there is only expensive ($20) repros.
1962-69 Mopar PCV Valve Chrome Cap Hemi Street Wedge - Shaker Cuda Hemi Auto Parts | ShakerHood Products
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Okay, first off, you've got stovepipes on your valve covers, so any of the "twist on" or push in "grommet" types are a no go without reworking everything. So you're limited to the early-mid 60s stuff.
Second, are you looking for breathers, or PCVs, or both?
The one you have listed from shakerhood.com will work, and is average market price for the piece, considering it has the cap and PCV valve. If, like you say, you can find the correct repro PCV valve for $20, then just get the cap and sve yourwself some cash.
https://www.megapartsusa.com/proddetail.php?prod=187-337-1064-1Breathers will depend on if you just want just a breather (which it looks like you already have), or a breather with a nipple- both are available.
https://www.megapartsusa.com/proddetail.php?prod=187-337-1064-Chttps://www.megapartsusa.com/proddetail.php?prod=187-337-1068-CThere are other sources as well, here's a few on EBay:
https://www.ebay.com/itm/1856200887...9B9e4ezRTLTpG5fErFuCaIiiU=|tkp:Bk9SR_jP9JGUYQhttps://www.ebay.com/itm/2335020727...plO2DCnx84gjCOJKrpHXnX+n4=|tkp:Bk9SR_jP9JGUYQ