305's??????

[tomsws6]

i have 18x10.5 on the rear with 285. was thinking of 19x10.5 c6zo6 with 305's. do i need to do any modifacation? a guy wants to trade my 18's for his 19's.

http://i284.photobucket.com/albums/ll14/tomsws6/ws6/014.jpg