Interesting to read through all of this as I think of building a motor for my wagoon which I'd like to occasionally autocross, but mainly just street drive as often as possible.

I'm currently considering a 360 Magnum loosely based on the recent build that Mopar Action did. I've been looking for decent mileage 2WD Rams and Ram Vans to scavenge the motor and OD tranny out of and then the rest will be based on cost from there.

I likely won't build it with EFI right off the bat, but if FITech turns out to be cost effective, I might do it that way. Their systems seem pretty good to me.