According to preflop solves, this is a pretty high EV squeeze spot.
Flop: We are first to act and have slightly less than 1 PSB left, so if this was vs. 1 or 2 regs I would just shove flop without thinking, but we are 4 way with 2 fish who probably have a real vpip of 70+. For them a 422 flop is more like a 988 flop for regs/lower vpip types where they could easily have trips or a wrap.
Do we still shove here? At which SPR and number of players would you start checking?