The F40 has just 4 teeth on the crank and 2 on the cam.
144 on the flywheel is not going to work with a cam sensor. The problem is there is only 2.5deg of space between each crank tooth. So if you center the cam tooth exactly half way between two crank teeth then it would only take 1.25deg of cam movement either way due to drive backlash (cam belt/chain/tension/keyways etc), then the cam tooth would would suddenly occur 1 crank tooth earlier or later than expected so this would cause a trigger error.
Usually engines with a high tooth count flywheel trigger would have an extra sensor with a single "TDC peg" somewhere on the flywheel to sync - but they are typically not capable of direct spark or sequential.
You are probably best to fit a missing tooth trigger wheel at the front.
