If your keeping the cowl vent, be sure to have a hose to drain the rain water out between the housing and the gasket or it will dump on your passenger side floor. Keeping these cabs dry inside seems like a full time job. There is more places for rain water to run in then one can imagine. I've been chasing leaks for 5 or 6 years now. Best I can say is I have it slowed way down, for now........Gene