RE best setup

Tom, what is the difference in the regular Dura spark coil & the TFI, Voltage?? never thought about using one, I use dura spark in all my Ford engine swaps @ the shop, I get the dist.coil, & blue grommet module from Autozone & if I want a better coil I use MSD Blaster, maybe I should try the TFI coil! On my 56 I use an old Ford Motorsport coil & module kit that was given to me by a Ford dealer that used to sponsor my Torino, don't know if there is anything special about the module other than it has a revlimiter. Earl E