5 lug swap which spindles

I currently have 5 lug 4 wheel disc all the way around on my 89 LX. I bought the car this way. I am having problems getting a 16x8 95 style cobra R wheel on my vehicle. They hang out about a 1/2 up front and they are just about dead even with the edge of the fender in the rear. I know they used SN 94-95 spindles on the front. I dont know what they did on the rear. But I am now being told by a guy that works at Jegs that the spindles on the front are my problem. He claims that I need spindles off of a 86-92 mustang and that I need rotors from a Ranger that are all one piece with the bearings and that or it will not work. Does this info sound right or not. Like I said I know my spindles are SN94-95. My rotors I have now just slide on to the studs on the hub. Another question is if this info this guy gave me is inaccurate can I pull the hubs off of the spindles I have right now and just get rotors off a ranger and put those on is that possible and if so will it change anything so the wheels I bought will work? And if so what years ranger do I need to get rotors from? All I know about the rear of the car is that it is supposedly 28 spline rear axle and it is 5 lug with disc brakes

O.K. thats cool. I found a 95 GT that has cobra R wheels on it. I am suppose to call the guy tomorrow and see if he will let me put a deposit down on just one of them and take it home and try it out. They are at a salvage yard. They are silver not chrome but anyways he wants 500 for them thats with the tires. 2 of the tires are pretty bad on tread and one wheel on the lip is bent just a little bit. I looked at them on the vehicle a couple of weeks ago but didn't have any money. Dont know if this is a good deal or not.

Also I measured the width of my wheelbase on the rear and the front and they are both at about 61 1/2 to 61 9/16 wide. I measured from hub to hub. Or to be exact I measured from under each caliper and from the front of the rotor surface that the wheel would sit up against.