Here is what GM performance recommend on their Hi-Po Crate LS376 / 525 horsepower crate engine:
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Camshaft LS376/525:............................... Hydraulic roller tappet Lift:............................................................ 525” intake, .525” exhaust Duration: ................................................... 226° intake, 236° exhaust @.050” tappet lift Centerline: ................................................ 110° LSA Rocker Arm Ratio: .................................... 1 .7:1 Oil Capacity: ............................................. 5.5-quart (with filter) Oil Pressure (Minimum, with hot oil):........ 6 psig @ 1000 RPM .................................................................. 18 psig @ 2000 RPM .................................................................. 24 psig @ 4000 RPM Recommended Oil:................................... DEXOS1 Oil Filter: ...................................................AC Delco part # PF48 Fuel:..........................................................Premium unleaded-92 (R+M/2) Maximum Engine Speed: ......................... 6600 RPM Spark Plugs: ............................................. GM 12609877 ..................................................................AC Delco # 41-985 Spark Plug Gap: ...................................... 040” Firing Order: ............................................. 1-8-7-2-6-5-4-3 Information may vary with application. All specifications listed are based on the latest production information available at the time of printing.
TIA for your answers.
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I have a fair amount of Gen I SBC build experience ( along with other marques ). Most of this is experience transferable to all engines, though some have their quirks.
1) Your "tuners" cam choice has too much lift for daily street driving, IMO. Plus a 0.600"+ cam should use solid tappets.
2) This build does not warrant a hi volume oil pump. That is lost HP.
3) The builder (tuner?) likely set the tappet pre-load at 1/4 turn or less. You will get some racket on warm-up.
My rec would be to go to a REDLINE 30 grade or Mobil racing. Yo can always call REDLINE and chat.
Enjoy the car! - Ken
p.s: GM performance specs a "synthetic" 5W30 oil on their warrantied monster crate Gen VI big blocks.