I don't know if they fit, but...

[Doober]

If Corvette manifolds fit, it looks like they're a pretty good manifold, especially if you are dropping in a stock engine.
http://www.carcraft.com/techarticles/ls1_engine_header_test/viewall.html

 

[Betcha618]

looks like they would have a problem fitting see how far they stick out from the block and how low the "front tube" sits, would probably hit the frme rail. look at the next pic of the camaro ones, they look like they would fit our cars better cause they hug the block more. Corvette stuff from what i've seen usually only fits the corvettes.

But unless someone tries we'll never really know.

 

[LT1_Malibu]

Depending on price the corvette manifolds are pretty stout pieces compared to an after market header. Only thing I bought eBay long tubes 1-3/4 primary for $210 shipped, and I'd imagine stock corvette would be more but you never know. It would be worth it to try and find a set for cheap or even free.