hi everyone,new member and want to say hi

[gnlover2]

hi everyone, lots of great stuff on here . i have a 81 regal with a 455 , 1986 gn and a 86 gn parts car , future race car?wondering if anyone can help me with my problem?? want to buy radial tires for my 86 gn and mount them on center line 15/7.5 rims. want to run 235/60 15 on front and the problem is what size out back?245 0r 255/60 15 . will the extra tire height help or hurt my overall performance.car has 50,000miles, ultra chip,k&n filter,new dual exhaust, hi-flow cat,new stock springs, and bilstein shocks, in tank poston hi flow pump, hotwire kit, regulator and press. gage ,eng. tie down strap, 30lbs disc injectors ,rjc power plate. thanks for any advice

 

[gnlover2]

hi everyone, lots of great stuff on here . i have a 81 regal with a 455 , 1986 gn and a 86 gn parts car , future race car?wondering if anyone can help me with my problem?? want to buy radial tires for my 86 gn and mount them on center line 15/7.5 rims. want to run 235/60 15 on front and the problem is what size out back?245 0r 255/60 15 . will the extra tire height help or hurt my overall performance.car has 50,000miles, ultra chip,k&n filter,new dual exhaust, hi-flow cat,new stock springs, and bilstein shocks, in tank poston hi flow pump, hotwire kit, regulator and press. gage ,eng. tie down strap, 30lbs disc injectors ,rjc power plate. thanks for any advice

lets burn rubber