Trouble is you have to do everything from the deck surface because of the way it’s machined or cast. Safety holding the head with the rocker shaft on the drill press could be asking for a major opps under drill press power. Kinda making a mountain out of a molehill here. Plans are to cut back on head porting jobs in the future and stick to more intake manifolds because of the time involved. I will not take on as many Speedmaster drop offs as I did last year for sure. Two stalled projects because of not being able to get parts really put me behind the 8 ball.