Engine build on the brain

yellow rose said
Just make sure you do the little things...like using an intake without a heat crossover (I think you are using EFI and if it's port EFI I still would not heat the air in the intake) get your timing curve in shape and get your cooling system where you can maintain ~170 degree coolant temp (can be 160ish if you done need a heater but I need one so I keep mine at 170) and get the correct heat range plug and you'll be golden.

Hey YR, are you measuring coolant temp at the normal SBM temp sensor point?

And the OP needs to know that with his HP levels, keeping the temps down to those levels is not just a matter of popping in a different t-stat. Needs a definite upgrade to the cooling system and paying attention to the details there, versus a stock system or a cheapo chinese rad.