Whats the widdest and tallest tire size i can go with a 3/4 Hotchkis Drop.... I want to go with 305 45 R18 in the rear with 295 45 R18's in the front. Is this possible.....

 

I got a 3/4 belltech drop with 285/50/20 on my ext. cab. Thats as big as it can go cause my trunk leaned a little to the drivers side and it would hit the front tire on some bumps, so I put a coil spring spacer in the front drivers side and leveled it up and it may touch on some big bumps around my area, cause I live back in the boonies. You will have to see a conversion chart to see how tall they are compared to your 18's.