You're right. I have used HV pumps in most engines I've built or replaced the oil pump in. Some engines such as Buick V-8s really benefit from them. I did think about it when I ordered the HV pump and even posted about it. Considering how easy it is to change the pump on big block Mopars, I don't regret my choice either. I now will have two pumps to work with and fine tune the relief spring pressure to get the results I'd like to see which to me would be about 60-70 at cold idle and 30-40 warm idle with 50-70 at high RPM, (input welcome on this). Also, you're right about sucking the pan dry. I spun a bearing on a big Chevy by doing just that, loose clearances with high volume/pressure pump and stock pan and one bonanzi top speed highway run.
