In case you're thinking about a 4L80E...

[The Chainsaw]

Originally Posted by Ruscal

Installing an LS would be quite an undertaking. I would need to trash:
New radiator
New hoses
New motor mounts
New headers
New 350 crate motor
New aluminum rear gas tank
New front half of exhaust system
New bell housing
New clutch adaptor ring

Not trying to get into an argument, but not sure why you would need to change:

Radiator
Motor Mounts (adapter plates use your existing mounts)
Gas Tank