That is pretty loud, and people in the parking lot will run to get out of your way when they hear you coming. With good oil pressure, most likely you are not hearing a connecting rod knock. One of those will be the first thing to go when serious damage occurs. If the oil pressure is good, it is doubtful a bearing has "spun", meaning it is destroyed. I'm only going by what you've posted so far.
Many of the larger ones can install it for you too. It will probably be less expensive and faster to find a good used engine from a salvage yard. Camshaft lobes are very sensitive to lack of lubrication so most likely it and the lifters will need to be replaced. Almost certainly the crankshaft will need to be machined or replaced. The cylinders will need to be bored oversize and new pistons and piston rings will be needed. They will be scuffed and the cylinder walls will be scored. With no oil pressure, no oil sprayed onto the cylinder walls to keep the pistons lubricated. Over the course of a few miles driving it like that, some of the connecting rods will get hammered out and will need to be replaced. For sure the crankshaft and connecting rod bearings are gone. The engine already needs to be totally rebuilt but some of the internal parts may still be salvageable. If there's a rod knock, the bearings have been damaged and the resulting low oil pressure is going to do much more damage if you keep trying to force it to run.
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