which Pertronix module?

360 2bbl 9-1CR circle track. races may last 15-30 minutes. I purchased a pertronix Ecoil #60103 with 0.32 ohms. which (HEI type) module should I purchase? Their D72000 module is a multispark unit & their D2070 race unit is not. which would you recommend? thank you for your time. RR