You can get a different LSA, the 112 does not bother me once the car is warm. On a cold start it has a little trouble finding idle, but I have never been able to leave it with a tuner long enough for them to get a good cold start tune.
When I did the cam swap put in new LS6 ported oil pump and a LS2 timing chain since the car has 120k+ at that point. You will need new springs. I went with the Patriot Golds since they are a good spring and you get the titanium stuff as well for only about 255 total, not to mention I rather have just a little more security with my springs, especially since the car usually sees 1000 miles a month.
Here is the chart that shows what the cam only swap did. Typically I shift at 6500 (on the tach) when I am racing seriously.
