You should grab the above offered elec distributor and use one of my HEI conversion kits.
The one HUGE drawaback to almost all of the aftermarket ignitions out there is that if something goes out you have to wait for a new one.
You can get replacement parts for my HEI ignitions over the counter, and in stock at any parts store 7 days a week and plug it in.
There are quite a few members here running my systems right now, and they are highly reliable as any of the owners can tell you.
Personally, I havn't had a no start situation in almost two years of daily driving.
They are not 99.00 any longer though, they are 149.95 and worth every penny.
They can be purchased here
www.classichei.com