Welcome to CHR, Bastian – you’ll find a lot of good hot rod and engine building "know how" here and we’re a real nice bunch of guys and gals who love cars!

The 327 is an all time favorite of mine. You’re correct in your assessment of the heads and I think a kit from summit such as a SUM-K1102 for $99.95 is tough to beat. It will work well with the combination of pieces that you have added with a noticeable difference in the 1500 – 4000RPM range. If you’re working with a Powerglide, I’d use this cam.

The SUM-K1103 (also $99.95 for the cam and lifters) will give you a bit more mid range, but is at the edge for stock stall converter and a 3.08 rear end. If you have a TH350, this cam would be okay as the 350 uses a 2.52 low versus the 1.76 for the Powerglide.

Others will chime in I’m sure

Again, welcome to CHR!
Glenn