I just finished a long standing build
03 silverado SS 6.0/4l60
The goods
216/220 on 114 cam
243 heads
2600 yank
Fast LSXRT
shorty headers
90mmTB
ls7 MAF

I am not all that happy with the end results. Pulls ok I want more. Feels like it's held back still. Maybe it's just the weight?

Cam is staying untill I kill the bottom end anyways. Where else should I look for power??? What else is left besides a stroker or forced induction???

 

Long tube headers bigger stall and cam

 

Long tune headers and bigger converter. Also i assume you have a tune

 

That's a baby cam for a 6.0L.

 

I am thinking OBS long tube headers and a yank 3200.

 

Sell that high dollar intake & buy a used MP112. Everything else you already have will work great with it. You would probably want a 3.0 pulley, but a 2.8 would be more fun.

 

Gears

 

Get a real converter, big cam and ported heads. Bet you will think different about your set up lol.

 

long tubes, bigger cam, bigger stall.
or just put some nitrous on it

 

Longtube headers will help it breath in a big way. More stall, bigger cam, and worked heads could all help a lot. Better still slap a pro charger on board.