If it was me and you already have the OFAB wiring then use that and buy a plug and play ecu from Boost Monkey, You could also go full megasquirt and make you own room which would be the better but more adventurous option.

What ever you do dont go OFAB ecu and OFAB management its overpriced and crap compared by modern standards and mapping it is also not a case of turn up somewhere and they can do it, Only a few places can do it.

HTH