I have a 1990 TBI 5.7CI with the full Edelbrock Power PKG. Heads,intake,cam,headers,chip. I very happy with it, but the stock TBI has mucho miles on it. Does anybody have experience with the 670CFM,TBI Holley 2 barrel. With these engine mods, am I better to rebuilt the stock TBI or step up again on the Holley system. Also thinking of the MSN ignition system.