Originally Posted by BantamTJ
True, I DO need vacuum given the type of driving I do, and my engine is mostly stock with an RV cam.
Not looking so much for a plug-n-play quick fix but rather an overall ignition upgrade. Read up on Team Rush 304-360 ignition upgrade and you'll see why I decided this route would be best for me.
I know all about it. The Large Cap upgrade isn't an "upgrade" over an HEI. That was my point. The BEST you could ever hope for with the Large Cap upgrade (team rush, although it was around long before it was called this) is to get even with an HEI. It basically makes the Duraspark system into what the HEI already is. Larger cap, so you can increase your plug gap, better spark plug wire connections, etc. And if you take the "upgrade" all the way, it has you replacing the Duraspark module and wiring in an HEI module.
And if you already had a Duraspark system, this might make sense, but since you need the whole mess replaced anyway, it doesn't. The HEI is of similar cost, and MUCH easier to do, and easier to tune once it's in there. Plus the whole parts available anywhere is a nice benefit.
But to each his own.