Hotrod Took a while to pick up on FLAPS...the dizzy makes sense if you watch a 216 running. Have alwats made my own HEI's out of almost any GM v-6 HEI most of these I didn't worry about the plug gap . Now all of these are on propane aalmost all are used L.P. equipment run fine. Have learned that if there hard to start the con verter is leaking thru making it rich,when there right they start with a little bump ! the best thing is never cold natured and fuel is 89 cents before taxes !