The HEI setup is pretty cool, I hadn't even considered that option.

The FBO box (http://4secondsflat.com/Ignition.html) has a rev limiter and uses a Pertronix 12V coil. I also use the FBO limiter plate in my distributor. The FBO solution for me worked best for me as it just drops in and hook up a jumper and coil and has the rev limiter.

There is another "bolt in" option out there with a rev limiter/12v coil (http://rev-n-nator.com/products.html) but I have no experience with it.