difference between 1986 and 1986.5 supra turbo

[nberghuis]

I am considering the purchase of a 1986 toyota supra turbo and I'm not sure if its an 1986 or a 1986.5. The reason I'm concerned about which one it is, is because I want to ad a couple of aftermarket performance parts if I was to buy it, and the only parts I can find ( and there hasn't been a whole lot of luck) are for the 1986.5. If anyone knows the difference between the two or of a place that has a wide selection of good performance parts please help me out.