special order wheels, need help.

[DUDEIDONTHAVEA240]

i have a 89 s13 coupe and want to special order 4 lug Gram Lights 17X8.5 (or maybe 17X8) fronts 17X10 rear. i want the car real low and FLUSH i know to roll fenders but i dont want to pull. what offset should i go for?
is my size okay and will it clear coilovers?

here is a picture of what kind of flushness i want on my coupe. i searched the offsets for this car and couldnt find it, i also search two 240 forums with no luck. thanks in advance.