2005 mustang wheel help

i just got a 2005 mustang v6. i wanna do 18's up front and 20's in the rear. i want the rear to tuck a little and the front lookin good, but keeping the turning radius relatively tight. where i dont need an 8 point turn to U turn. what offset does it take to tuck safely on these? its a 5 lug pattern, i need to make sure exactly which it 5 lug it is of course. i want it to sit like the old muscle cars people like foose and tripanya are building. i will get the car leveled off like that as money comes in, but will 20's all the way around fit and be a good drive, or should i go with 18/20 or 19/20.....

20s ALL THE WAY AROUND

have u seen this? pics? or is that just what u want to see lol.