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Coxie..... ...the new modern 12 volt square frontmount coil used to have an enclosed note that said "13.8 volts MAX". (but who reads instructions, eh?) Problem is the commonly used Delco 10-SI 12 volt alternator outputs about 14.7 volts. This will burnout your new 12 volt coil. They used to recommend using a current limiting resistor with their new 12 volt coil of 0.47 ohms and 10 watts. Guess what? unless you're an electronics junkie, you're going to have a hard time finding one. So here is what I recommend instead. Get a RadioShack 2-pack, p/n 271-131. (2) 1 ohm, 10 watt square ceramic resistors. Twist the leads together and create a 1/2 ohm, 20 watt current limiting resistor. (20w is more better than 10w) Now use this "trick" resistor beween the ignition switch ON and the frontmount coil terminal. I'll let you be creative and figger out where to mount that hot bugger. Some use a radioshack screw terminal block in place of the original "infamous ballast resistor". And YES, you still need that 1-resistor inline between alternator and ignition switch. It is acting as a "decoupling device" to prevent the engine from running on when you turn the ignition switch OFF. It is acting like the popularly used "idiot light" that GM uses with the Delco alternator. Points gap is still 0.015.
Sparkie gap is still 0.025. HTH..... ...Dell
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