I run a hi-volume pump with a stock pan and 6qts of oil and I have seen 6400RPM and never once sucked my pan dry....that sucking the pan dry is total BS......
If your running a stock pan with 6 qts. in it aren't you over filling it by a quart (or 2)? Maybe the reason you aren't running it dry. I know a racer that told me he was having problems running his dry and he over fills it a qt. and has no problems now. I know for a fact my 360 was full to the full mark on dipstick (4 qts. in the pan and 3/4-1 for the filter) and sucked the pan dry at a little over 6000 rpm. I watched it do this on the gauge or I couldn't say this. Another thing to remember is 360 main bearing surface is larger than 318 and 340's so requires a little more oil. This combined with possiblity more bearing clearance and running a windage tray and the block wasn't de-burred. Well you guys can say it's bs but...