You all are giving me a headache with all your numbers on oil pressures, from a simple question of "can I use a H/V oil pump in a stock oil pan without problems". He seems to have a mostly stock motor and not a full blown one. In 87' I had built two 340's, also mostly stock (forged 30 over bores with DC cams, one auto and the other manual cams). Both had installed H/V oil pumps, one 5 Qt.(dart) and the other 6 Qt(van) pans. Still running them and never an issue with either one. I run both hard at times and never ran the pans dry as some believe will happen. I did a test demo at a car show years ago that called to drain the oil and water from a 225 six and see how long it would take to blow up. 40 min. at 2,000 rpm's the cam broke. My belief is if you hear a tick or knock, you have a mechanical issue that needs to be addressed. I have seen dirty heads that would not allow oil to return to the pan, but that is another thread.
