Want this question answered?
As long as the 1999 has the 3.5L engine, yes.
It will fit either way. Whichever is easier.
No, it will not fit.
yes
Yes, it should.
I have factory 96 Cutlass 5 spoke Aluminum 16" on my 01 Alero
Yes.
yes
yes hoods are the same 2000-2004 ls1
Yes, It's the samething.
If they both have a similar engine, yes
No, they are different generations and therefore require different hoods. A 98 hood would only fit on a civic from 1996-2000