I know of a few people who had them on their LSx Fbodies and GTOs .. They were a pain to install, lower end quality but made decent power (450-550 rwhp).
Most of the guys that had them, dumped them for custom turbo setups that were much, much better.
99 Chevrolet Camaro Z28 M6 - 6.676 @ 103 in 1/8, 10.512 @ 130.2 on street tires, H/C/I
93 Eagle Talon TSI AWD 5spd - Built 6 Bolt, 16G Evo3, HKS 272 Cams - under construction
94 Mustang GT - 5.0 bored and stroked to 347, Vortech V1 @ 10 PSI, Tremec TKO 600 - PIA