planning on replacing the oil pump in my motor (stock 5.0) while i have it apart.....

was looking at the melling HV oil pumps.... just wondering of any possible problems i might not be thinking of......


i will put a hardned pump driveshaft in, and will have a new steel distributor gear.....


can anyone think of any problems i would run into.... they advertise the pumps only flow like 20-25% more oil, so i dont think it will suck up all the oil from the pan, but i dont know for sure........ anyone had any experience here ?