[twobjshelbys]

Search will find you plenty of topics on this subject...

You don't say what base Cobra you are considering. Alot will have to do with what the ending config you desire. Don't put a 50K engine in a 40K car.

Windsor based. Lots of displacement options available. And you can get one that will shake you to death at idle if you get the right cam but it's much easier to build a streetable car with one.

Used "side oilers" are a crap shoot. You never know what you're getting and mistakes can be expensive. Modern incarnations like from Shelby are also expensive.

I would avoid the Coyote. The Cobra group is still pretty old school and cars with Coyotes are harder to sell. Cars with Chevy engines are even harder sells.

Godzilla is a tight fit although someone did manage to put one in - I don't know if there's a topic here but my recollection was the car was built knowing it was going to be used because it wouldn't fit in a standard Cobra configuration.