Fabricated a spacer 0.230" long to go between the oil pressure relief plug and spring. This will increse spring pressure to increase oil pressure. The hot oil pressure was a little low at 25 psi. Test ran the engine and got it hot to 205F oil temp. The oil pressure was at 45 -47 with oil temp below about 100F and at 205F was at 35 psi above 1800 RPM and 32 psi at idle RPM (900RPM).
Oil pressure relief spring spacer
Oil pressure relief spring spacer installed on spring
