another freaking engine build thread

I haven't built a 543 but I'd be looking into several things - first - the heads. IMO, neither RPM or Stealth is enough to feed it. Look at the Indy EZ offerings and I'd look to get them ported. Second - Run more cam. A solid flat tappet with another 8-10° duration @ .050. Third - Run a real set of headers. If the budget is open so no need for tri-Ys. Last - The Milodon single pickup external system would be fine.