Question on Dual Coils

As they are pro stock they probably were not running stock point style distributors. In all likelyhood they had distributorless ignition such as this here.
www.compu-tronix.com/DIS4009.htm


Why DIS?
Standard distributors distribute a spark to each plug in turn, from a single coil. At higher RPM’s, they cannot charge and discharge the coil fast enough to deliver a full charge to the spark plugs. The DIS4 solves this problem through the use of two 45,000 volt coils charging and discharging in turn, allowing each coil sufficient time to charge and discharge a full spark. This equals more power.

Conventional cap and rotors allow for spark degradation, arcing and ozone as the current travels through the rotor and across to the cap contacts. By doing away with these antique parts, the DIS4 is capable of supplying a full energy charge from the coil to the spark plug with no loss. The DIS4 is supplied with a billet aluminum triggering rotor which converts your stock 009 distributor into a triggering device for our electronics package molded into the new lid. By designing a system that does not use a cap and rotor, we have essentially worked the bugs out of your Bug… and helped you into the 21st century!

Regardless of brand names, or claims to the contrary… The DIS system delivers more power than any single coil system, Bar None!

Math and Physics can’t be argued with. Simply put… It works!

This model uses a single coil module [made of 2 individual coils] and 4 output terminals. It fires 2 plugs every time a cyl is nearing TDC compression. The mated plug is on the exhaust stroke. It is commonly known as a wasted spark system. Car manufacturers have used this for the last 20 years prior to COP coil on plug design.

If you want to shoot flames do it this way as it does not rob the ignition system of any power.