Jeff, I'm not sure that a stock coil wouldn't work, but here are a few considerations. The HEI is meant to work on 12V. The stock coil is not. The control module in the HEI might not like less than 12V. The stock coil might get a little smoked running off 12V on a long run. Here is a thread on Stovebolt about mounting an external coil. Richard posted some great photos. There are also external coils made by MSD and ProComp. I picked up a ProComp on that auction site for what a cap with the coil in it would cost, which is another option
Larry
http://www.stovebolt.com/bboard/cgi-bin//ultimatebb.cgi?ubb=get_topic;f=3;t=001851
