This is about as close as I can find in the Herbert catalogue:
CHH2 240/240 DUR@.050, 640/640, 110LC, 2500-6500 - HERBERT CAMS
280 at 110 would be inlet open 30 BTDC, close 70 ABDC, exhaust open 70 BBDC, close 30 ATDC. Overlap advertised would be 60 degrees.
240 at 110 would be inlet open 10 BTDC, exhaust close 10 ATDC. Overlap at .050 would be 20 degrees.
The issue with picking a cam for Webers is not just the LSA, because 110 would be fine if the cam was only say 210 @ .050.
Once you start getting into above 230 @ .050, the LSA becomes more critical.