[Lew Silverman]

Bob, you may need to pay a visit to the local automotive "recyclers" with a tape measure. I had the same problem installing a larger 4-core replacement in my truck. I'm sure there's a Malibu or full-size GM product with the correct spacing for your 3rd Gen. Don't forget to grab the rubber grommets from the bottom of the support, you'll need 'em!

Lew