340 max camshaft with exhaust manifolds

Vizards rule of 128 goes like this;
128 less (cubic inches of one cylinder, divided by the intake valve size; times .91) = Lsa
for a 273 with 1.75s, it comes to 110
for a 318 with 1.88s valves, it comes to 109
for a 340 and 2.02s, it comes to 109
for a 360 and 2.02s it would be;
128less (45/2.02 x .91)= LSA =107.7, rounds to 108
for a 408 stroker and 2.02s it comes to 105
As you can see, for regular SBMs, the 110LSA is daymn close.