SBM Edelbrock/Speedmaster Head Data

Bobzilla said

Look up pittsburgracer's Speedmaster head threads. He showed how he was tubing the common wall head bolt hole and the pushrod hole so he could grind right up to it.

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I don't remember him tubing the bolt boss but that's my memory.

I always grind the boss down until I break through (assuming I need the area) and then I install the tube.