95 3100 in 99 alero with 3400

[thorpa2006]

broke the cam was wondering if i can put a older 3100 out of a 95 lumina in my 99 alero gls which has the 3400

[Superdave]

It's technically illegal but yes you can.

[Rootie524]

illegal?

[pocket-rocket]

If you swap an engine, you are supposed to go with a newer one, not older. The exception is off road use. Then you can use whatever you want because it's exempt from emissions.