Completely non-Pontiac answer, but does apply to remotely mounted GM HEI modules.....
I modified the distributor in my '52 GMC six cylinder engine by ..
1. Removed the points and condenser from the GMC distributor.
2. Machined the center hole of a mid-70s Chrysler 6 cylinder reluctor wheel to slide down over the GMC distributor's cam that activates the points.
3. Mounted the matching Chrysler magnetic pickup in the GMC distributor.
4. Used about 5-6 feet of 22 gauge twisted pair shielded wire (because the wires were so long, I didn't want any false firing because of electrical noise) to connect the mag pickup to a GM HEI module that I mounted on a heat sink.
5. Mounted the module & heat sink inside a gutted voltage regulator that was mounted on the firewall.
6. Connected the HEI's output back to an MSD Blaster 2 coil (oil filled, 0.7 ohm primary winding).
I used the white heat sink compound. Been working fine for 3+ years of almost daily driving.
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My Pontiac is a '57 GMC with its original 347" Pontiac V8 and dual-range Hydra-Matic.
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