Hello everyone. I have recently purchased my second Monte Carlo. It’s a 2000 Monte with about 125,xxx miles. The only downside is that it’s a 3400. I’ve decided a 3800 swap wouldn’t be worth it just for the few extra horsepower but I don’t wanna leave the stock 3400 in since I want more power leaving me with one choice only.

V8 swap.

I’ve been looking into V8 swapping my Monte for some time now and I believe it’s time to start seriously considering what it will take to do so.

I've thought about going the LS4 route since it seems to be one of the easier ways to go but there also seem to be downsides to an LS4, specifically getting the 4T80-E to fit properly on the LS4 crank seems like it will require some modification and clearance-ing.

The other route I’ve been considering was going with a complete Northstar L37 and 4T80-E so that everything fits like it should with the transmission at least but I’m not sure about how it would mount in the engine bay and what kind of work would be required to mount it.

Has anyone done or researched either swap who could give me some advice on the details and more information? Any good information from a reputable source I can get would be appreciated greatly.