Adapting a SBC Intake to a SBM

You'll buy a decent tig and make your own for cheaper than buying what you need to do this, but I'm curious as to why mechanical injection? You can go EFI and make more power and do so far easier.

Governing body limitation?

Yes, sprint cars have no charging system and no battery either. They use a magneto. Your not allowed to use any digitally controlled engine functions.