73 Duster 318

If you have A/C, you really need to be careful with the cam you choose. Going too wild on the cam will definitely affect the performance of the compressor--it did on my 318. About the headers, well they will hang low on the driver's side. For a daily driver they are a major pain in the arse. I hear the TTI header's have a lot more ground clearance on the driver's side, but they are expensive. Good luck with your build.