**Comp XE268H in a 273...**

Then try this one if you don't believe me about the first one. This is the next size up, but in a 273 this one will not resemble a stock idle.

http://www.summitracing.com/parts/hrs-cl710991-08/overview/make/dodge

I agree Rob, that one's prolly too big, and the 108* is probably too much for a 273. I have an older Purple Shaft on 108* on the shelf that'd be too big too.