a Frenchman who needs advice for GM HEI MODULE!!!!

I put a GM 8-pin module on an old PC CPU heat sink cut to size, but a simple flat aluminum plate "should work" (as in TrailBeast' kit) since that is how GM installed them in their small-cap distributor.

A bit late, since you bought a kit, but read my post for ideas on simplifying and upgrading underhood wiring: www.forabodiesonly.com/mopar/threads/modernized-engine-wiring.176755/