My last one was an OE 70's black chebby HEI module/OE 70's Mopar electronic dist/furd full 12V TBI? coil that Dog put me on to (dirt cheap at Rockauto). Didn't have the truck long after that but I noticed it started instantly which it didn't before. EDIT this elims the ballast & the HEI is (or can be) mounted under the dist (both giving a cleaner firewall) & you can get a full 12V intended regular round coil (that furd one does look unsightly).