You do have one right. haha

It seems like the two Buick emblems are throwing everybody off. #4 is NOT from a Park Avenue, and #1 is newer than my car.

I will give another hint in 2 hours if its still causing headaches

Here'* the next clue! Of the 4 emblems, two came from W-bodys, one from a H-body, and the fourth is from an N-body.

So what about...
1)Park Ave
2)Olds eighty-eight
3)impala
4)Regal
??

Park Avenue is a C-body

Ohh! Then my last guess on the first one is the Century! If thats not it, then I have noo clue!

Well, I'll give you an A for effort haha.

1 is from a LaCrosse (aka Allure)?

Yes it is.

So does that make 2 an alero, 3 an impala, and if that leaves 4 the h body, it would have to be a lesabre?

We have a winner!