both motors will have sleeves and rods and pistons, i'm trying to figure out wich one to do, i already have the b20, but just kinda second guessing the project.......but something has to start soon cause the car needs another motor...

 

they are pretty much the same except that the ls is 81mm and the b20 is 84mm, but if you are going to sleeve it, you can get the ls and sleeve it for 84mm. if it was me and i didnt already have a block, i would go ls and sleeve it to 84mm. but since you already have the b20, just build that.

 

ya i think that would be the best bet, my concern is i just need a built reliable motor, that i can run like 1bar on daily.......and still beat it up at the track, i wanna push somewhere around 450 to the wheels.....

 

just build ur b20 if u already have it, or u can sell the block to someone for mo money and buy a ls for cheap. will help u toward sleeving