Down to 2 cams

The 901-16 springs you have are perfect for the 268 cam. The 275 cam is a good cam. But, to run this cam you will need the recommended valve springs. The 995-16 are a dual spring and will require that you take the heads to the machine shop and have the head casting around the guides milled down so Viton seals can be installed, the rubber stock type seals will not fit inside the dual springs.