Well in GM MAF it is very forgiving when it comes to tuning and still runs well, data is not right, but it runs well, tuning idle is all the work but still done all the time. SD does have parameters to adjust WOT and idle.
If you don't want to program anything? Why EFI? Carb is the only choice and you still need to change jets and power valves to get it right.
Can't help on the rest? Good luck!
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