Your SLR (or overall first gear ratio) is your first gear ratio multiplied by your rear axle ratio.
How do you determine what's the appropriate overall first gear ratio?
3.09 X 4.56 = 14.1522
Most guys with clutches don’t real near enough 1st gear because they listen to guys who’ve never run a stick. I’m a bit low with that first gear, so when the Dana goes in I’m going to go with 4.88’s and I’ll still drive it on the street.