SD questions

[hardheadfamily]

I know this is not a mustang question but there seem to be a lot of people that are very knowledgeable. Here is what I have in my 89 Ranger 2wd. 86 non H.O. Speed Density with an AOD from an 86 Grand Marquis (the car was cheap complete) no A/C no smog pump, all else is stock.
I have been reading a lot of info about using an Explorer or Cobra intake and gt40 heads and a cam with the duration of no more than 114 because of vacuum issues.
Would this work with my non H.O. engine and would I see any significant increase in power, would I need to upgrade to 19# injectors I believe mine has 17#, and would I need an adjustable fuel regulator, more gph fuel pump, headers, dist, coil, and wires?

I am looking for some specific info. on what combos might work since money is tight and do not want to just through money and parts at it that wiont work.