W2 valve size recommendations

Fixing to do up a set of W2 heads, that have never been assembled. Any of you head gurus, or engine builders wanna give me a recommendation of what size to cut them for? My last set was 2.05/1.60 but I didn't build those. I will port these, and intend to use a solid roller in the neighborhood of 590-620 lift, on a 365 inch smallblock. Drag race only, nostalgia 4 speed car, expect the power band to be 5000 to maybe as much as 7500 rpm...I appreciate ANY input or suggestions!