It's the general lee
The ugliest Canon ship Ever
Ugliest ship we have a model for is without a doubt the flying half brick known as the 'Hounds Tooth'
The Hounds Tooth always reminds me of a Jawa Sandcrawler with rocket engines.
It could be a:
Ford - Saturn, Astro, Sunliner, Galaxie
Chevrolet - Vega, Nova
Studebaker - Starliner
Nissan - Pulsar
Mercury - Comet, Meteor
Jowett - Jupiter
Pontiac - Sunbeam, StarChief, Sunbird, SunRunner
Oldsmobile - Starfire, Jetstar
Pontiac - Starchief, Astre
Mitsubishi - Starion
Opel - Astra
Toyota - Space Cruiser
Mazda - Cosmo
But I hope it is a Mormon Meteor:

Because this one should be a starfighter!
Because this one should be a starfighter!
That looks a lot like Grievous' starfighter.