It doesn't matter whether it is a shorter track or not, as all you do is plug in the RPM's and what the MPH is at that RPM. In your case using the formula from Wallace Racing (
http://www.wallaceracing.com/calcmph.php) with the 5.57 gear , 32 tall slicks, and 7800 rpm the MPH should be 133.37 without any slippage or tire growth. Now if you keep adjusting the RPM's down until you get the MPH that you are actually running, the number will be 6500RPM that corresponds to 111 MPH. That shows that you have 1300 rpm's of slippage. This other calculator from Wallace (
http://www.wallaceracing.com/converter-slip.php) shows that the converter slippage is 17% assuming a rollout of 102" for your slicks.
To give you an idea, my car has the 16x33 slicks, with 4.56, 1.80 powerglide, weighs 2700lbs and my 60fts are 1.238 leaving at 4000 and I run the 1/8th at 5.64 @ 121 mph at 6200 rpm's at the finish and that is only about 8% slippage. If I was to make a gear change and was only going to be running 1/8th mile, I would go to the 5.13 which would move the RPM's to around 7000 at the finish.
Bill