im no expert but i have looked at altering or making new trailing arms for my zx and it doesn't seem so straight forward. they are a semi-trailing arm, they are not just 90deg to the wheel, they are mounted on an angle. i wanted to do something because the wheel pulls forward when the car squats. and the zx's like to squat. i have 17x8 with 0-offset with 235/45 tires and i had to clearance the front of the wheel well lip. it was actually hitting the front of the wheel well. i have a 400whp LS motor in it but i also have 380lb springs in the rear and the car comes stock with 125lb springs. you can put like eibach springs in it but its still gonna squat pretty good even with a stock motor. i want to eventually figure out how to move the mounting point for the semi-trailing arm back more. you can play with the offsets and run inward more. i have lots of room to the inside left over but my opinion (again im no expert) but with a car that squats alot, once it does, and you have some crazy offset wheel, the tire is not gonna stay flat on the road and you will just end up riding on the inside edge. so i stuck with 0-offset cause thats what the car was designed for. and i get lots of traction. ive road coarsed it and i go to the dragstrip alot and i am very happy with it. even when i had a stock v8 in it and was still running the 14x6's the car hooked pretty good. the zx's get lots of traction as is.
im not saying something different cant be done or that it would be wrong so do whatever you can do. i see that there is others with the wider tires but id be curious if they rub when they are hard on them.
good luck