When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Bigger undercut valves will gain regardless of the cam. Just tge stems alone are restrictive. I'm running a stock cam with a ported head and it has even gained. It's worth it IMO if you want to make "real" easy power.
I would still do the orings and use the wide fire. No point in leaving weak spots that can be avoided.