Pertronix and Ignition Coil wiring confusion

[aphaynes]

Originally Posted by bozzhogg

This may be off topic but I have a '66 GMC with a 305D V6. Am I suppose to use the same sparkplugs as the 305E or am I to use a different plug for the 305D V6????

I have no idea. Maybe the pros here can answer that.

[bigblockv6]

You're not off topic at all, The 305D was used from 1961-62 and will have shorter reach plugs over the 305E so it is important to use plugs specific to the 305D. AC-C44-S were the spark plugs used on 305D engines, long discontinued so you will have find out what number cross links with it or replaced it.

[newyorksong]

This entire thing needs more research because I read a post from the HCI guy who seemed to know quite a bit and he pleaded "Please if you use PerTronix use it WITH the ballast resistor wire in the truck!" His point (ha points!) was that it will work fine with the lower voltage and NOT burn out as the PerTronix can do. I am doing this now and wondered about the info from PerTronix about doing away with the ballast resistor wire. Fingers crossed but I did notice that aphaynes WAS able to run to the drive-in WITH the ballast resister (which BTW is what looks like the silver stranded wire looking wire) ... The wire IS the resister! Plus my 65 1000 ran for 3 yrs with the 2 wires on positive of coil. Much more important however is: WHAT MOVIE???