for you to have 40% and just breakeven you need him to 4betshove 99+/AJ+ and that's a wide range even for a SS, that's 6.3% of the hands. and w/ that range you are 0EV or slight +EV w/ a huge variance and w/o other reads then just the fact he is a SS that minraises his BTN your assumption that he 4bets shove so wide is wrong.