306 / C4 combo, going to be sprayed...

Picking up Headers from Gator this Friday, and I'm not sure on the size of the collectors on them (Gator? StangItMan?) - but I was wondering what you guys thought / suggested for the combo: 2.5" or 3" exhaust? I think I'm going to run MAC Pro-Chamber and MAC Pro-Dumps.



Mmmm, once I get the exhaust squared away, I'll be almost done sourcing the "expensive" parts left in the build!

Thanks,