" From: Wrambler <wrambler242@xxxxxxxxxxx> " " I know on my Motorcaft conversion I removed the resisitor wire from " the original harness to feed the electronic box and coil full 12V. my understanding of the svc mans - duraspark 1 did not have a resistor ds2 did, same as a points system box always gets 12v coil gets 12v for starting, through the resistor running this would make hei the easier swap for amc sixes up to '67, which don't have ballasts, and ds2 the easier for '68-up, which do. as i said, i don't know about the tfi setup. i assumed that if it's basically the same box and all as ds2, just a different coil, that it would have a ballast too. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list