One time I did install a Holley carb main jet as a shim under the relief spring,it seemed not to increase the oil pressure that much,maybe 5 psi??
That is what SBC guys have done,but for the SBC it increases pressure by 10 psi IIRC.
Tom,
how think are the shims that you have put in & how much oil pressure have you gotten?
MBHD
