Do you still have the stock rear narrow track housing? If so I would recomend the low backspacing (2.5") and don't run wheel spacers.
But if you swapped in an IFS rear then i would run the wheel spacers and a more nuetral backspacing (3.75")
I currently run IFS rear end with an 85 front end...
I deal with them quite a bit, I only have good things to say too!
They are really good with customer service, and correcting any problems that arise. :D :D That's why they deserve my money...
Toyota Of Bellevue. If you don't remember, my name it's sean. I know you live quite a bit north of there i can just mail it to you, just pay a lil bit for shipping.