Figured I'd make a list of LS engines, what they can be found in, factory specifications, and bang for buck tips.
LS1
346 CID or 5.7L
Cast aluminum block
Aluminum cathedral port heads
3.900" bore X 3.622" stroke
10:1 compression
305-350 HP & 335-375 TQ
vehicles it's found in:
98-02 fbody
97-04 vette
04 GTO
LS2
364 CID or 6.0L
Cast aluminum block
Aluminum cathedral port heads
4.000" bore X 3.622" stroke
10.9:1 compression
400 HP & 400 TQ
Vehicles it's found in:
05-07 vette
05-06 SSR
05-06 GTO
06-07 CTS-V
06-09 trailblazer SS
LS3/L92/L99
376 CID or 6.2L
Cast aluminum block
Aluminum rectangle port heads
4.065" bore X 3.622" stroke
10.7:1 compression
400-430 HP & 410-428 TQ
Vehicles it's found in:
08+ vette
10+ camaro
08-09 G8 GTP
07+ Escalade, Tahoe, Silverado, Yukon, Sierra, and hummer H2
LS4
325 CID or 5.3L
Cast aluminum block
Aluminum cathedral port heads
3.780" bore X 3.622" stroke
10:1 compression
290-303 HP & 325 TQ
Vehicles it's found in:
06-14 Impala SS
06-07 Monte Carlo SS
05-08 Grand Prix GXP
08+ Lacrosse
LS6
346 CID or 5.7L
Cast aluminum block
Aluminum cathedral port heads
3.900" bore X 3.622" stroke
10.5:1 compression
385-405 HP & 385-400 TQ
Vehicles it's found in:
01-04 Z06 vette
04-05 CTS-V
LS7
427 CID or 7.0L
Cast aluminum block
Aluminum rectangular port heads
4.125" bore X 4.000" stroke
11:1 compression
505 HP and 470 TQ
Vehicles it's found in:
06+ Z06
15+ Z28
LSA/LS9
Supercharged 376 CID or 6.2L
Cast aluminum block
Aluminum Rectangular port heads
4.065" bore X 3.622" stroke
9.1:1 compression
LSA 556 HP & 551 TQ
LS9 638 HP & 604 TQ
Vehicles it's found in:
09+ ZR1 vette (LS9)
09+ CTS-V (LSA)
11+ ZL1 camaro (LSA)
LQ4/LQ9
364 CID or 6.0L
Cast Iron block
Aluminum or iron cathedral port heads
4.000" bore X 3.622" stroke
9.4:1 compression LQ4
10:1 compression LQ9
300-347 HP & 360-380 TQ
Vehicles it's found in:
LQ4
99-04 silverado, Suburban, Yukon, hummer H2
LQ9
02-06 Escalade
03-07 silverado SS, Sierra (most likely Denali)
LY6
364 CID or 6.0L
Cast iron block
Aluminum Rectangular port heads
4.000" bore X 3.622" stroke
9.67:1 compression
352 HP & 382 TQ
Vehicles it's found in:
3/4 ton 07+ Silverado, Sierra, Suburban, Yukon
L76
364 CID or 6.0L
Cast aluminum block
Aluminum rectangular port heads
4.000" bore X 3.622" stroke
10.4:1 compression
366 HP & 376 TQ (trucks)
361 HP & 385 TQ (G8 GT)
Vehicles it's found in:
07+ Silverado, Sierra, Suburban, Yukon, Avalanche
07-09 G8 GT
VORTEC 5300
325 CID or 5.3L
Cast iron or aluminum block
Iron or aluminum cathedral port heads
3.780" bore X 3.622" stroke
9.5:1-10:1 compression
285-320 HP & 325-340 TQ
Found in
99+ mid/full sized trucks and SUVs
VORTEC 4800
293 CID or 4.8L
Cast iron or aluminum block
Iron or aluminum cathedral port heads
3.780" bore X 3.267" stroke
9.5:1 compression
270-295 HP & 285-305 TQ
Found in:
99+ Silverado, Sierra, Tahoe, Yukon
LS1
346 CID or 5.7L
Cast aluminum block
Aluminum cathedral port heads
3.900" bore X 3.622" stroke
10:1 compression
305-350 HP & 335-375 TQ
vehicles it's found in:
98-02 fbody
97-04 vette
04 GTO
LS2
364 CID or 6.0L
Cast aluminum block
Aluminum cathedral port heads
4.000" bore X 3.622" stroke
10.9:1 compression
400 HP & 400 TQ
Vehicles it's found in:
05-07 vette
05-06 SSR
05-06 GTO
06-07 CTS-V
06-09 trailblazer SS
LS3/L92/L99
376 CID or 6.2L
Cast aluminum block
Aluminum rectangle port heads
4.065" bore X 3.622" stroke
10.7:1 compression
400-430 HP & 410-428 TQ
Vehicles it's found in:
08+ vette
10+ camaro
08-09 G8 GTP
07+ Escalade, Tahoe, Silverado, Yukon, Sierra, and hummer H2
LS4
325 CID or 5.3L
Cast aluminum block
Aluminum cathedral port heads
3.780" bore X 3.622" stroke
10:1 compression
290-303 HP & 325 TQ
Vehicles it's found in:
06-14 Impala SS
06-07 Monte Carlo SS
05-08 Grand Prix GXP
08+ Lacrosse
LS6
346 CID or 5.7L
Cast aluminum block
Aluminum cathedral port heads
3.900" bore X 3.622" stroke
10.5:1 compression
385-405 HP & 385-400 TQ
Vehicles it's found in:
01-04 Z06 vette
04-05 CTS-V
LS7
427 CID or 7.0L
Cast aluminum block
Aluminum rectangular port heads
4.125" bore X 4.000" stroke
11:1 compression
505 HP and 470 TQ
Vehicles it's found in:
06+ Z06
15+ Z28
LSA/LS9
Supercharged 376 CID or 6.2L
Cast aluminum block
Aluminum Rectangular port heads
4.065" bore X 3.622" stroke
9.1:1 compression
LSA 556 HP & 551 TQ
LS9 638 HP & 604 TQ
Vehicles it's found in:
09+ ZR1 vette (LS9)
09+ CTS-V (LSA)
11+ ZL1 camaro (LSA)
LQ4/LQ9
364 CID or 6.0L
Cast Iron block
Aluminum or iron cathedral port heads
4.000" bore X 3.622" stroke
9.4:1 compression LQ4
10:1 compression LQ9
300-347 HP & 360-380 TQ
Vehicles it's found in:
LQ4
99-04 silverado, Suburban, Yukon, hummer H2
LQ9
02-06 Escalade
03-07 silverado SS, Sierra (most likely Denali)
LY6
364 CID or 6.0L
Cast iron block
Aluminum Rectangular port heads
4.000" bore X 3.622" stroke
9.67:1 compression
352 HP & 382 TQ
Vehicles it's found in:
3/4 ton 07+ Silverado, Sierra, Suburban, Yukon
L76
364 CID or 6.0L
Cast aluminum block
Aluminum rectangular port heads
4.000" bore X 3.622" stroke
10.4:1 compression
366 HP & 376 TQ (trucks)
361 HP & 385 TQ (G8 GT)
Vehicles it's found in:
07+ Silverado, Sierra, Suburban, Yukon, Avalanche
07-09 G8 GT
VORTEC 5300
325 CID or 5.3L
Cast iron or aluminum block
Iron or aluminum cathedral port heads
3.780" bore X 3.622" stroke
9.5:1-10:1 compression
285-320 HP & 325-340 TQ
Found in
99+ mid/full sized trucks and SUVs
VORTEC 4800
293 CID or 4.8L
Cast iron or aluminum block
Iron or aluminum cathedral port heads
3.780" bore X 3.267" stroke
9.5:1 compression
270-295 HP & 285-305 TQ
Found in:
99+ Silverado, Sierra, Tahoe, Yukon