New wheels.
 

Does anyone know if these will fit my 80 280zx 18X8.5 in the front and 18x9.5 in the rear with a offset of +35 need to know before i buy them.

no. that offset is huge especially for those wide of tires. +0 offset is standard ish measurment on our Z's wheels

Oh looky (Deja Vu???????): https://www.zdriver.com/forums/showt...ghlight=offset

in front, 8.5 wide fits with an exact offset. You need to figure that one out. I think the offset that works is about +20

In back, 9.5 should fit but not with +35. (0 to +15) Those offsets are for late model RWD cars. Those wheels in 5-lug would fit my 350Z

whatever you do, for your 280ZX you might want to stick with 18x8 in front and 18x9 or 9.5 in back