Stockish 340 upgrades, cam needed
Note, I edited posts, I had left the 9 off the spring number and posted the cam in by accident (Doh!). That’s close to being an outer edge spring for a juice cam, with 120 pounds seat and 350 open. I expect that’s a deal where you break it in with only the outer springs and then immediately change oil and install the inner springs. And good call Cudafever in the tuning. The closed chamber aluminum heads with quench at .038 and a slow advance curve with proper plug selection will be fine on 93 octane. I would like to see the curve Halifaxhops would do for this. I’m thinking for 91 octane it may even be close to a stock 70 or 71 two stage curve.