FYI/bump from the grave: unmodified stock cases with a mazzy anticipato crank opens at 121* BTDC and closes 45* ATDC, give or take a degree or two. so that's right around 166 degrees of total intake duration. That means the "anticipato" crank yields about 20 more degrees of intake duration over the stock crank, other things constant.
Obviously check your port timing on your specific cylinder if you want to time everything perfectly, but hopefully this is still useful information. Will be getting timings on the speed cases + anticipato soon.