Aftermarket EFI on a Magnum- your experience??

You can run it with megasquirt, including any sensors and throttle bodies you want. I did an LA engine but the ideas work the same. Been running it on my engine for 4 years and it's done well. You just have to source your parts. You'll have to buy a wideband O2 kit (I have an AEM) but other than the wiring it's not a big deal.