This is a bad site for an unbiased opinion. LT1 is a good motor... A good, yet dated motor. The 6.0L is a better motor if you ask me, or most anyone else on this site (except ducky it seems). But again we are kind of biased this is LS1truck.com not LT1Truck.com
Also, I've seen a couple LT1's that have an issue with deep water due to the location/design of the distributer on the newer style LT's. Sence you are a Z71 possibly an offroad guy this may concern you. However because the made this motor for like 40 years it may not lol.
2004 Chevy/Regency RST, 6.0L LQ4, custom built NV MG-5 tranny by local Tranny Guru, Hurst Shifter, K&N FIPK, stock Regnecy Exhaust, 3.73 gears w/ Eaton Locker, and the Magnacharger huffer topping it off w/ stock pulley... for now
Looking to meet people w/ LS1 trucks in the OKC area PM me