Hoping some people can chime in with some suggestions for ported heads for my setup.

As of right now I'm on stock heads, mods are:

105 springs
modded retainers
xp cam
S2 IC
tog headers
stock rockers
80lbs injectors on E85


I'm considering some ported heads at this time, what does everyone suggest?
  • What should I have done? stage 1, 2, 3?!?!
  • Change springs?
  • retainers?
  • valve seals?
  • Larger exhaust or intake valves??
  • Should I go with L32 heads or stick with L67?
  • Is their any specific years where the heads were better? L67 or L32?