Looking to purchase headers for my project. The engine is a 493 CID with Edelbrock RPM heads, a Crower roller with around .600 lift and a FAST fuel injection setup and I think it will make in the 550HP range. Car will be mostly street driven and have a 3" exhaust system but will also be taken for some passes at the local strip. I'm trying to decide whether to go with 1 7/8" tubes and 3" collectors or 2" tubes with 3 1/2" collectors. The 1 7/8" tubes are an easier fit especially with power steering, but I don't want to choke up on the exhaust either. Thoughts?