Historically, these siamese port engines haven't been very friendly when using EFI and TBI has always been the better option. There have been mechanical FI intakes in the past but they seem to have been replaced with carbs as a better option as well because of the siamese ports, and the fuel robbing issues experienced between adjoining cylinders. In the end, you may end up spending a large amount of money to also realize the siamese port head is a hard animal to tame.
