How far to rev this 273 commando build

I build to rev to the moon, so I can shift whenever I please. If it blows up. I'll take it apart and figure out why it broke, make it better, and start over. That might not be the quickest way to the finishline, but I ain't a dragracer.
I'm just that crazy guy who gets his fix listening to his dual 3's screaming long and loud, on a lonely country road, in the middle of the afternoon.
One thing I learned is this; If your gonna spend significant time over 6000, your heavy-rod SBM engine is gonna want to have the oiling system modified so the rods will live. IDK about the lighter rods in the 273s.
With the mods,and a roadrace pan, mine has been spinning, dare I say it,over 6999lol,since 1999. The oiling mods are cheap and easy, and they work. Ok wait; the hi-capacity pan wasn't cheap, but since the engine has survived this long, maybe it wasn't quite as expensive as I thought.

On another note;
To the guy who might be confused about valve float and lifter pump-up, don't be; the first leads straight to the second and for all practical purposes happen together and almost simultaneously. The valvesprings fail to keep it together, and the lifters do exactly what they were designed to do, which is take up the slack. Lifters are just automatic slack-adjusters.
Unfortunately for some guys, pumped-up lifters send the valves straight into their hi-compression pistons, and that spells catastrophic failure. So the take-aways here are; 1) don't let this happen to you, and 2) cuz it gets really expensive in milliseconds, so 3) get a rev-limiter, or 4) just do what I do,spring the chit out of it,run a minimum lifter preload, and pray the lobes survive. So far, so good.
Ok that's not good advice. The cam grinder will call for the springs, and the spring manufacturer can tell you the limits, so those guys have scienced it out for us. If you go beyond their recommendations, then yur on your own.
As for me, I'm moving the daymn wall. I guess I got enough spring pressure on this engine, cuz there was this one time, back in about 2003 or 4,when I missed a shift, and saw the tach-needle crossing the 8 on it's way back down. I immediately crossed rev-limiter off my wish-list.
That do-what-I-do, spring-the-chit-out-of-it philosophy, saved me probably what 5Gs maybe 6 Canadian. A rev-limiter would be cheaper than replacing a cam-kit tho. But then I would lose my 6999 plus screaming banshees fix; and without my fix, I might not want to go on living,lol.