Doing a straight air intake tube is challenging/impossible on older cars.
Check out this guys build...
http://ls1tech.com/forums/conversion...l#post13928089
I bought the airaid kit, carefully cut and glued my setup similar to his. Turned out great.
As far as tuning..speartech and "tuned by frost" are great LS tuners (to mail your PCM in).
My PCM has been worked on by both with great results. I am planning on putting a larger can in over the winter (along with LS6 intake). I may try texas speed tuning only because I plan on buying my parts from them.