TOO MUCH OIL PRESSURE

IN MY 65 DART I HAVE 318-390 engine with 90 degree oil filter adapter because i have a set of TTI headers. I have tried aluminum and steel adapters but cant get it to seal at bolt that holds adapter to block. Been fitti g a leak for a while. Tried mopar gasket kit and mancini new bolt kit but it just will not seal. Any ideas? Thanks Bradley