I agree the HV pump is a good solution. With the higher clearances you need more flow, especially hot idle. It has worked well for me on my 496 with 3/8" pickup. Usually the relief spring as supplied is about right though there can be variation.

The HV pump needs a strengthened drive gear for reliability. Key improvements are hardened hex, radiused transition from hex to shaft and pinned gear. Higher loads with the HV pump can fail the stock piece. Mancini and others have them.

Oil viscosity can be used to "tune" the pressure. Mine likes 15W40.