ok ...i'm lost now .....i would think that the map(or bap) would be wired the same on either harness (auto or man)....as long as the harness is still for a mass air car(i'm not positive thuogh) .......if it goes bad on a mass air ecu ,it shouldn't effect a whole lot other then start up .........?
as for the nuetral safty switch ,i'm not familiar with the wiring schematics at all .....i would think that the safty switch circiuts would be seperate from the ecu's engine controls ....... 
just for the sake of curiosity ,keep me updated on what you find out
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the "not so old",old guy
87 Mustang GT T-top >hanlon t-5, pro 5.0, centerforce clutch ,adj. cable/quatrant ,3.27s ,full 2 1/2 ex(off road H) adj. reg. ,e-cam ,70mm TB, cobra intake ,1.7rr ,ported/milled e7ets w/crane springs ,306 balaced/decked short block w/speed pro forged flat top pistons ...257rwhp/302rwt
best et 13.7@102 (4/11 )
'80 Capri (future project,currently collecting parts for 351 moter)
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