I have a 1973 Mustang with a 351C and a C6 with an Offy intake and Edelbrock 650 carb. The vehicle also has 4V heads, but other than that, it is pretty much stock.
I purchased a Mallory Hyfire IVc unit that came with a Unilighter distributor (Mallory). Both of these items came off a 351C. There is a lot of information on how to install the units, but not a lot on what the IVc unit does. I tried to contact Mallory but the kid on the phone was worthless. I tried to write emails to them, but I have been waiting for almost 3 weeks for a response. Mallory is not on my list of very responsive companies.
Regardless, does anyone know where I can find some information on these units. Specifically, I would like to know exactly what the IVc unit does. Secondly, the Unilighter distributor does not have a vaccume advance module. I'm assumming that it uses mechanical advances and does not need the vaccume any longer.
I currently have a Petronix kit in an OEM distributor with a Petronix coil. This works good so I am in no hurry to upgrade the system until I find out what the Mallory system does for me. Thanks