Hey guys. I plan on buying the following.

Pacesetter LT
TSP true dual kit
yank ss3600 converter
3.73 gears

I will obviously need to tune for the rearend and trans modifiations. I was told I could do a mail order tune from lsxtune.com. Will this be sufficient?
And how do you put the tune on your vehicle?

 

You send them your pcm they throw a tune on it and send it back.

For those modifications i would say a mail order tune would suffice