The motors got a cam and ported heads. I built it for a different reason currently, I’m running Camaro manifold on it which flows fine, but I feel like I’m leaving stuff on the table by not running headers with the ported heads.
I have used the search function but don’t see a good answer to this. I have a 99 suburban 2500 getting a 6.0ls-6l80e swap. I see the speed engineer long tubes specifically say 1500 only.
Is there a long tube that fits the LS in a 2500 4x4?