hei's were a bit malighned (and dismissed) when first introduced, now, theres a bunch of companies tweaking, rebuilding and selling them and singing their praises. msd also makes a small cap hei and, there are even hei's converted for ford performance (an oxymoron?) engines....i'd go to a junkyard, there are tons of them every where (just make sure you get one with a vacuum canister) and check the shaft and drive gear for excessive movement and slop. hook up your dis. power wire (minus resistor wire) and you're good to go...you can always upgrade coils, modules, cannisters, etc.etc. later on.....good luck