Join Date: Mar 2007
Location: San Antonio, Texas
Last time I checked, the Fiat sites were selling the heat-sinks separately. The 'Plex was popular on period Fiats and Lancias as well as Alfas. Also, I'll bet if you put a "wanted" post here on the bb someone will most likely have a heat-sink that they'll sell you. I'm pretty sure APE will have one too.
As an alternative, you could dispense with the heat-sink and HEI Trigger and just use an MSD6 ignition. MSD sells an adapter (shown in the photos earlier in this thread) that makes the MSD plug-compatible with the 'Plex distributor sensor. It completely bypasses the heat-sink/HEI trigger and allows the MSD to drive the distributor sensor. If you are interested in original appearances, you can mount the MSD in the passenger compartment and rout the wiring through grommets into the engine compartment.
Probably, the best coil to use with a 'Plex is a low resistance, non-ballasted MSD Blaster. A well knows Alfa and Fiat race mechanic I know runs 'Plex ignitions exclusively in his race cars and substitutes the Blaster for the "Plex coil. If you're interested in original apearance you can always paint the MSD coil black.
It seems that, despite their age, HEI 4 pole triggers continue to be commonly available. There are a number of aftermarket brands of improved versions which offer hotter spark, etc. I'm using an ACCEL 4 pole trigger on my my hot-rod Super's engine that was recommended by RJ. Typically, it turns over only two or three times and then starts right up. That's pretty good for an inductive discharge ignition.
Jim . . . '72 Super 1300, '70, 1750GTV, 2nd series,
'62, Lancia Flaminia Zagato3c, 2nd series
Last edited by 180OUT; 06-14-2019 at 11:54 AM.