Yeah sweet as man seems heaps that are putting the n1 pump on do put the drive collar on, but I'm still not 100% sure if its a n1 pump or just a standard replacement pump, either way there is no drive collar on the crank so just gotta wait to pull the oil pump off and inspect on what went wrong hopefully everything is ok,
The car was been build for 400hp old owner never got a tune done and was running 11psi and use to give it a hard time, he even had it running 21psi he says...