So it is for speed but you have to make sure water pressure is ok.Starboard side plugged is faster. When done, watch water pressure to make sure ok.
I always do this, allison, stv, guess i've never tested without doing it, i just always do it . haha
Thanks! With the input I have received, there doesn't appear to be negatives, I will go with it.Robbie at Lee Sanderson's has always filled that hole for the Allison mod cases. They work fine and carry good pressure.