I bought some boston acoustic 6x9's from this dude for $6 bucks. The speakers are in good condition and sound top notch. Should I make the holes in the rear deck bigger to fit em or not? How would I go about doing that?

 

nice catch...what year is your 3rd Gen.

I have a '91 SE and the rear deck is already factory cut
for 6 x 9 speakers.