I draw a black line (permanent marker) on the porcelin where the backstrap is on the plug so i can see where my mark is..i try to get the backstrap in the 12 o'clock position..but 10 and 2 will work...i index for clearance insurance only..keeping backstrap as far away from piston as possible.
Brian
__________________
Bjuice..
"I'M YOUR HUCKLEBERRY ! "