The best replacement for lt1 is ls1.

The best alternatives to lt1 are rated as following:
★★★★★  ls1
★★★★  lt4
★★★  lt2
★★  tpi
★★  l98
★★  5.0
★  ls1 which is better
★  vortec
★  4.6
★  ls3
★  l99
★  350
★  5.3
★  ls1 camaro
★  ls1 engine
  sbc
  ls1 t56
  ls1 stock
  lt5
  l05
  383
  ltz
  camaro lt1
  l98 corvette

Your alternative for lt1 is not listed? Suggest!
Speaking about lt1, one probably shouldn't forget about turbo 350.

Other search terms related to lt1 and their ratings are:
★★★★★ turbo 350
★★★ t5
You have in mind a companion for lt1 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of lt1 in all years. Click on graph for more.
lt1
ls1
lt4