I've got an EJ22 installed since 2000 in my full camper Westy. I drive it like a normal car but you know like 4500 lb Vanagon too. Sometimes I accelerate aggressively just for fun and I've very frequently had an additional 1500 lbs in it over mountain passes. I generally don't even think about the RPMs although I do often wonder if having the engine sing along at 3600 on the freeway is going to blow it up one day.?