What Ignition to use

In your search for ignition systems take a look at FBO (www.4secondsflat.com)
Made in the USA, good strong ignition with digital rev limiter, and the backing of a privately owned USA organization for any possible warrantee issue's.
IMO, one of the best quality and priced systems out there.
Call Don (the owner) and talk to him in person as he really knows his stuff and is real easy to talk to.
I was happily running a stock Mopar electronic setup when my brother gave me an MSD 6A box and Blaster coil for Christmas. Installing the MSD stuff with the stock electronic distributor noticeably increased the power and gas mileage. This MSD 6A box now has more than 340K miles on it without a burp. I am also running another 6A box on my truck, also without problems so far. These things start instantly.

On the other hand, I installed an MSD billet distributor/electronic ignition unit on my 76 Ford F-350 and the ignition module went intermittent then died in less than 5K miles. They wanted more money to repair it than it cost new. So I put in an Accel billet distributor (the stock Ford distributors are famously wimpy) that could be used as a trigger for an MSD 6A box and Blaster coil, and that system has been great.