Sounds like my Grandfathers 1964 Impala he bought new. High compression 327 blew out the factory mufflers and he relplaced them with lifetime mufflers from Sears. Those poor people at Sears got sick of repacing those mufflers till he traded for a new ‘69 Lemans two door post.
I got a ‘64 Impala 283cu inch 2dr when I was a HS
senior in ‘69. Love that car looking back on it.
I changed the paint job from silver to light green
and added chrome reverses and baby moons.