Another 273 commando build .. This one will be a "BEAST"

Here are the Erson cam specs again I will use in the 273 .
according to old erson catalog. it's a high flow Im. 286/240 duration, .492 lift, .022 lash. cam part # is 420721. says, it's a hi lift , short duration,, delivers strong power from 2000 to 7000, good idle, good for auto with gears.