I wouldnt say that in comparing LS1 to LT1. I dont know alot about LS1s b/c I dont own one. but I know LT blocks are 2 or 4 bolt, and I am pretty sure LSx's are always or maybe mostly 6 bolt mains. They have higher Compressions motors, better flowing Heads/Intake/TB. LT1's arent crap. I was gonna say the shortblock is good, but if its a 2 bolt main, least you can say is that its a 350.