thinking about an oil cooler, general questions Options

[shaggy]

how much will an oil cooler help me?
im running a stock 1.7 now, but id really like to bore it out

how big of an oil cooler should i get?

will it still work if i have an oil bath air filter?

i have an a/c condenser in the front trunk does anyone have any idea if i could just drop that thing and bolt in an oil cooler?

cuz then i think i could still have a full spare and i know thats alot of my front end crash protection

if i could do that could i run the oil lines through the same lines fro the ac? if not can i run 'em under the car instead of through the cabin?
id really like the car to appear stock but not be (i.e. bir bore, possibly brakes, better shocks and id like an oil cooler)