A 360 passing for a 318

..............and it depends on "how it runs." If it runs like a stone, tell 'em it's a 273/ 318. If it runs like a raped ape, see if you can get any mileage out of a 273, LOL

This guy claims it's a 283................

[ame="http://www.youtube.com/watch?v=-YRsvkRHqsg"]55 Chevy Gasser Pass - YouTube[/ame]