One bit of advise I will give is to make sure you follow the coil warning carefully... Meaning if you run a low resistance coil you will fry em without a ballast resistor... I did it (hate to admit it) more than once........ ???
Bringing this back from the dead. What would qualify for a low resistance coil? Mine ohm out at 3.1 ohms on the primary side and 9.1k ohms on the secondary side. My coil is a no name with no markings on it to go by.
The pertronix is a much better unit than the compu fire. The comp units have poor QC these days. Pertronix fits tight and timing doesn't walk around and the units are more robust and do not require high resistance and with work with high/low ballast resistor/no ballast reisitor. I have no experience with computronix. Also the pertronix billet (msd look alike) distributor with the ignitor II already in them are very nice units that really perform well for the price. Just my two cents on the budget ignition stuff.