Madz28 and PCMforless.com Tune

What exactly do either of these tunings do??? How hard is it to take the computer out of your camaro? What type of HP gains can I Expect??? Is this safe for an LT1 with 134,000 on it???

The tune can do a wide range of things,: rev limiter adjusment, disable speed limiter, premium gas power tuning, fan kick on temp. adjusments, ect. ect. Gains of 10 rwhp or more could be expected and it is safe to do on a 100K LT1. If you go to Madz28s site, he has a small tutorial on how to pull out your old PCM. It is very easy. Here is the link. http://www.madz28.com/faq.php#question8

Or do it like I did and buy the cable to connect your ALDL to a laptop and download a tune by email. I loved it and there was no downtime. In my old Caprice I dropped from a 14.82 stock with 3.08's in 50 degree weather to a 14.43 with 3.73's in 75 degree weather with no other changes. PCMforless has the best tune in my opinion.