EFI question
Depending on "what all" you are doing, you don't "need" the Holley dominator. The HP based ECU is no slouch. I cannot name them all off the top of my head, but some of Holley's "non mpfi" systems use the HP computer and can be upgraded. Only the name changes, ECU is same.
I THOUGHT I heard that Holley now has a plug/play hemi setup. Holley has a forum, and Denny is extremely helpful
A quick Google shows they do have some......
https://www.holley.com/news/articles/holley_releases_plug_and_play_efi_harnesses_for_gen_iii_hemis/