Rod bearings scored?

This isn't the only problem obviously but what oil pan are you running? I can't stress it enough that a factory center sump oil pan ain't worth a hoot for racing because it has no acceleration baffles to keep the oil where it needs to be. I learned this the hard way yrs. ago after oil starvation from hard launches ruined the bearings in a 360 I was running in less than 3000 miles. You can weld in an acceleration baffle or buy a good aftermarket pan with them and more capacity. Oil is the lifeblood of the engine

Factory oil pan.