If you don't have the "Nebula California" PDF, you might want to grab it from the CGL store. It has rules for doing super heroes with 'Mechs (putting hero stats/powers into BattleTech mechanics).
Or, if you want to fall back on the old TSR Marvel Superheroes game for stats, a typical human there has about 25 hit points, and 1 point of BattleTech damage kills a typical human, so you can use that as a rough conversion factor, which would result in Hulk's standard punch doing 4 damage, and a very angry Hulk's punch doing 20 damage.