8k rpm ...
Don't have a number in mind honestly, just want it to hold together !
This all stems from a guy near me with a 327/4spd 55 Chevy. He drives the **** out of his car, shifts at 8k everytime he drives it. Sounds amazing!
Tell him to have his tach checked. I'd bet it's wrong.
And a SBC isn't a SBM.
Like I said, BTDT and have the scars to prove it. You need at least an X block or better. Period.
You need to fix the oiling system and every book ever written, every tech article ever published is wrong. Dead wrong. You ain't going to fix that junk oil in system with a grinder, a drill and tap and some tubing.
I won't even get into how you'd ever get the valve train anywhere near stable enough with a W2-5 style rocker system.
It goes on and on. You won't be running a spur gear pump. You'll have a gerotor pump. That takes a HUGE pickup to feed the pump at that RPM.
At that RPM you just about need to block off the internal bypass in the pump and move it outside the pan. And then you have to plumb it.
And you still haven't fixed the oil timing issue yet.
I hate to say it, but if you think you want that kind of RPM, go get a SBC and a tach that has been corrected.
Best of luck.