I looked that cam up on Elgin's website.
Elgin Industries
Intake opens 3 BTDC and exhaust closes 3 ATDC for only 6 deg of valve overlap.
Intake 3 BTDC to 41 ABDC and 180 + 3 + 41 adds to 224 deg.
Exhaust 47 BBDC to 3 ATDC and 180 + 3 + 47 adds to 230 deg, not the 224 stated.
So the exhaust is running 6 deg more duration than the intake.
I thinking motor homes use bigger cams than that.