I noticed that after doing this GM HEI upgrade that i was pinging a LOT under WOT load. Come to find out, this GM module is adding advance! I have 4 of these module and every dang one of them adds about 10 degrees of advance in the higher RPM's! SO, how are you guys using these without problems from that? This is the later 7 or 8 pin module out of an early 1990's GM truck.