Has anyone thought of swapping out a LS4 for a LS2 or the almighty LS7? How hard would it be? The reason I asked is I entered a local drawing and the grand prize is a LS7 crate motor. Which I would love to see in the engine bay of my Impala SS if I would win. I know it would require serious work to the tranny, but think of it an Impala 427 SS. Bring on the SRT8's.

 

Nothing is impossbile as long as you have the money. An LS2 would be nice to keep a factory look (without going with a power adder).

You would have to get work done on the crankshaft and other assorted parts... not too much though. If you went with an LS2 block you might even use the 5.3L crankshaft as it has the same stroke... not sure how that would effect balancing though.

 

It would be a bit difficult since the LS7 has a Dry-sump. As for the LS2, it may be totally doable. Very similar sizes externally. It's just the snout on the crank to think about. I'm not sure if the LS4 has a shorter snout due to the accessory drve being more shallow.

 

Good point about the dry sump. If everything fit a dry sump might even be better for the sideways engine.

The crankshaft is shorter on both ends.

 

Ah crap. I feel like a Moron. I stickied that thread for you and never read thru it all yet.....

 

lol, like you said it is really long and can get boring