Offset Question

[capitao]

hi

the car is aristo v300 1998.

if i decide to upgrade the front calipers to supra ones, the std wheels will not fit isn't?

i know there is a specific range of offset to clear the calipers, but and the rim width?

i want to buy tte 18x8.5 +40 and 18x10 +40.lets say i decide to fit 18x9 at the front and 18x10 at the rear with different offset to have more dish.what offset recommended?

Work wheels have 3 types of disk:standard A disk,deep rim O disk and big caliper R disk.

i found the offset i desire which is +40 for the front ones at big caliper section. but lets say if i found also the same offset at std A disk and deep rim O disk section. what i must order?