yeah I'm in the process of doin a 89 trans am GTA LSX swap..i've been goin over this in my head for about a week now..should I tear the motor down and inspect and clean everything or should I just forget about the rebuild and just stick the motor in..before you think i should take a look at these pics i took today..valvetrain is beautiful..apperantly the motor has 80,000 on it..neways thanks for any feedback..jack

 

When I did my first LT1 swap the engine had 40k on it and was guaranteed to run.. with that all I did was change out the any sensors that could be crapped out or worn, cleaned it up and put it in..

If you have a warm fuzzy and don't want to mod the internals I would replace any seal that might cause you major grief later and put it in the car.

 

Looks clean to me. My 5.3L i just cleaned up the outside and shoved`r in.

6.0L was stripped to the shortblock for cam heads and all new gaskets.

LS series gaskets were very well designed from the factory, and dont have any common leakin problems im aware of.

 

if motor came from running vehicle then it should be no problem.

my own 5.3 has 280k miles and runs strong as new. and it tows my cars and boat, well til at least the hurrican took my boat

 

Yeah? So am I... I'm guessing that you'll be fine, like Sheldon said, the LS-series engines are pretty well designed...