James,
looking at this very issue with fuel injection on my project. Going to go rummage through some experienced auto parts this weekend and take a look at mopar (jeep) inline port F.I. and, if
I can find one, a throttle body off a 7.5 GM truck. A couple of different ideas are percolating. Working with an Inliner member that races at the lake so he's been helpful. You get to this stage the pocket book has to open some.

Let us know how you intend to develop your F.I. system. Good stuff all.
If it aint broke, you're not trying.