3.9 Liter V6 Swap
1988-2003 at least quite a bit more than "a few" years.
My 1993 could barely get out of it's own way.
My mom's 92 was a bit peppier.
She now has an 03 QC. About the same as the 92. OK but certainly no illusion of performance at all.
All got 18 MPG max.