[RICK LAKE]

1Trkpony Russ I don't know how make heat cycles you have done with the torch, but stop before you breakoff that corner of the block or get the area out of center or weaken it. I have had this problem before with my Shelby and other Aluminium motors. Some come out and others stay in for life. I have cracked the ears off an LS1 motor trying to install off set dowel pins for a Lakewood bell housing for racing. 1/2" hole(2) deep and the pins was the easiest way to go. Put tape on the drill bit so you know where the 1/2" depth is. Good Drill bit and go slow, this is no race. Try and drill straight. IMO, the pins are more for centering the bell that stopping it from twisting. As long as you use all the bolts and a little loc-tite,(blue) there shouldn't be any problems. Don't over torque the bolts. Rick L. Ps Russ try and keep the pins as far away from each other as possible. If you are looking at a clock. mine are 10 and 2 positions. Don't put them within 2-4" of each other, there could be too much wiggle. Been there tryed that.