small case or large case alternator?

[Slumpin 0]

im going with a 200 amp alternator from excessive amperage in the ca group buy. its going in an 87 trans am daily driver with a kenwood 35x4 and an eD nine.1, going to do the big 3, have an optima yellow top 31, and run 0/1 gauge wire back to a distributor and 4 gauge to the amps. for daily driving, im wanting a small case not a large one right? large is more for spl vehicles that sit and idle as they burp correct? my car idles around 750-800 right now because i have a minor vacuum leak but once i track it down and fix it should be more like 600-650 idle.

[Supa_c 1]

Get the one that fits what you currently have