HEI will not fit with a Tri-Power manifold.
A straight HEI will not need a PCM. Only a single 12v keyed supply and a tach wire.
I prefer to use the stock points distributor and coil and a 6AL MSD ignition box. I hide the MSD unit in between the inner and outer fender on a plate and then the car looks totally stock, but has the benefits of an electric multiple spark discharge ignition.
Bolting on a MSD 6AL will definitely 'Wake-up' your motor!
Last edited by Rukee; 11-08-2008 at 10:21 AM.