I say NAY to the blocked crossover WITH the 413 heads.
And YEA to water injection
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Why would you not block the heat crossover? Cooler intake charge is more detonation resistant right?
My take ?...on the 413 industrial head WITH COOLANT HEAT ....leave it open. It’s not nearly the huge heat of the exhaust crossover
SORRY .. but water injection works ... I used it on a duallie tow rig with windshield washer fluid - it worked
I am going to respectfully decline Doc. I am thinking worst case scenario, the engine runs hot, coolant in the intake gets fuel temps way up in the carb. Don't need gas percolating while I am trying to restart on the side of the road. May give up a little mileage that way, I don't know.. I'll be driving in warm weather and it won't take long for the engine to get to temp even without the extra heat.
