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Full will be fine .

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Some recommend using a high volume oil pump with full groove bearings, is that truly necessary or can you use the stock sized oil pump to save on horsepower?

Were talking performance street build not to exceed 6000rpms.

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I run half groove bearings with a standard pump have 40 psi at hot idle and spin it to 7500 every shift and I checked my bearings at 150 passes and they look like new.
If you pay attention to the details and do a quality build no need for 3/4 or full grove bearings IMO all you do is lose bearing surface.

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I run half groove bearings with a standard pump have 40 psi at hot idle and spin it to 7500 every shift and I checked my bearings at 150 passes and they look like new.
If you pay attention to the details and do a quality build no need for 3/4 or full grove bearings IMO all you do is lose bearing surface.

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w a mild perf build . I would open up the angled gallery to crank oil holes & restrict the 1-2-3-5 vertical cam bearing passages to 1/16" and if you feed the heads externally then reinstall the #4 cam bearing turned a bit to block em or instead of externally feeding the heads you can turn the bearing and tap into the main horizontle gallery and T ing over to halfway up the angled oil pasage to each head on each side which'd b hidden & only after doing either of these bypasses then you can restrict that vertical crank to cam passage to 1/16" like the 4 others. Cam bearings leak ALOT of oil. Overkill but rods fed from the #4 main have starvation issues and you may decide to get on your "mild performance build"