Re: exhaust cross over (heat riser) fill
NHRA pours an outer runner to check cc`s on a Pontiac head.
It`s okay to fill the heat crossover but you can`t do any blending in the exhaust bowl on a Stocker head.
On a bracket head my buddy who does heads for a living will over fill the heat crossover in the exhaust bowl so he can blend all that in when he ports the head. Not legal in Stock.
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Adam Strang 1018 STK
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