8 3/4 ring gear change for optimum low end performance

check this graph out; It's for a 5.2M but you can get an idea;
check out the power at 2000, I see ~105hp.
Check the power at 2400; I see ~130hp..
Now check it at 2800, I see about 155hp.
And finally check at 3200, I see ~180hp
How much power do you want at zero mph?
I mean, you are choosing a launch rpm here, just like slipping the clutch with a 4-speed. But one thing that is different is that every time you upshift, and the rpm would normally fall below your stall rpm; now you get to chose a higher rpm just by standing on the gas.
Here's an example;
Suppose you were taking off somewhat sedately, and yur sitting at 3400 when you shift into Second. Normally the Rs will fall to .59, so 2000, and yur engine kindof lays down. But say you had a 2800 stall. Now you can step on it and immediately the Rs pop back up to 2800 or more. Check out the difference of max power available at 2000 versus 2800. On this graph the difference is from 105hp to 155hp. So if your engine is soft in that zone, the 2800 would perk it right up.
Now 3400 in First-gear with 3.55s could be 28 mph. So on the 1-2 shift with the Rs dropping to 2000, yeah, it will be a tad sluggish if you had just 105hp. But with the 2800, comes 155hp and she perks right up.
Don't forget I am working off this 5.2Magnum chart; so your 360 will be even perkier.lol. Pick your poison

power-318-gif.gif