I would like to either get the comp cam XFI 268 or the comp cam XFI 273, but I am not sure what the real differences are. I already have a programmer, and since my truck is the Daytona, I also have the Borla exhaust system. I will also be getting the 6.1 springs and push rods. Would that be enough for the XFI 273 or would I need a better exhaust/headers?

 

I think you will need special tuning for the 273 since dodge lives in the stone age and doesn't use MAF. If you have no other engine work done such as head work and such, the 268 will be a better choice.
You might also look into these cams,http://inertiamotorsports.com/camshafts.html

 

Yeah I have been reading around a lot. I already ordered the springs and push-rods and will be ordering the cam either tthis Friday or next. I guess I will just go with the 268 for now. Once I get some new heads I will probably end up getting one of the inertia cams.