Not sure this helps but when Kappasphere released wheels for our cars back in the day the wheel specs were:Does any one see any issue's with these rims other than there not BBS. The offset is 30 our stock i think is 55. I'm not sure if center rings are needed due to the hub hole. Thanks
Front 18X8 50 offset
Rears 18X9 52 offset
Front 19X8.5 45 offset
Rear 19X9.5 55 offset
The wheels were called Gravana J2 also known as Monarch 410. Most folks went with 245s on the front and 275s on the rear.