Mustang 5.0 is back

[Homeslice]

At a sub-15k price point during 80's, what vehicle offered the performance of the Mustang and offered a smoother high breathing engine?(85 Gt could be had for around 10K)

This question never put a requirement on NEW cars......Thus I took the liberty of discussing used cars. Furthermore you didn't say "offered the speed of the Mustang" you said "offered the performance of the Mustang." Performance = both speed and handling last I checked.