Thanks for all the help guys. Got it all put back together and have oil pressure now, all looks good. I'm not sure what did it, The old oil pump seemed to be o.k. (replaced it anyway) and after pulling the distruibutor back out and putting it back in, making sure it was engaging the pump before putting the pan back on, it was down the same depth as before. Never did find a clog on the oil pressure/filter port, but after taking everything apart and putting back together everything is working now as it should. Don't look a gift horse in the mouth i guess, again thank you everyonr for all the tips and help, couldn't have done it without you.
Darren.