No man, most of the "L"'s are Density.
Here is my .02:
I have JMS chip. They have tuned lots of Lightning combo's and nailed mine the first time, course it was an easy Cal. The other two chip burners I've heard are good as well. If I had it all over to do it would be EEC tuner and here is why:
1)With a chip how do you know you have the best combo, nothing to compare it to.
2) The more mods you have the harder to tune your truck by mail. I've heard countless war stories about guys trying to tune the 30's through the mail only to go slower than their 19's.
3) Raymond would not let you buy a tuner and have you stumped not being able to help yourself. He has proven himself time and again to come to the aid of the needy.
4) As time goes on the tuning data base increases and known combos will be made available as well as the willing and able to help others. There you go.
BTW, when my heads go on, I'll send my chip back for a recal then see how it goes. If not well, I too may have a $300 paper-weight-----EEC tuner here we come, its inevitable sooner or later.
Later
STeve