My rpm limit is at 6.300 rpm, the engine would see this rpm max 4 times a year for a few seconds.
The max rpm on the street or highways was 5.300 rpm this season, for a few seconds too.
We did some hill climb race, 3 times 1/8 mile dragrace and some race similar to autocross, all on the hobby / amateur level. Just for fun.
You have some Racing in mind.
Alot is based off of personal experience & seeing what works & has failed.
Stock Small Block Chevy Rocker arms are not that good.
Fine for daily drivers.
Fine for C4 Tuned Port Corvettes with mild cams like my own.
Around 270 - 280 advertised cam duration is when Roller Rocker upgrades are a good idea on a SBC.
Stock BBC Rockers are better, but almost always get ditched because they are built for max power on pump gas or race fuel.
Stock Pontiac RAIV Stamped steel rocker arms are good. To find New Old Stock is just about impossible, ran them years back & never failed with a full CC 290B6 Drag race cam.
Switched to Crower Enduro Stainless Steel.
Stock Oldsmobile Stamped steel rocker arms hold up to heavy abuse also with Hydro cams.
On my 1965 Olds 425 in my 63 Gp.
I like to see the Good stuff put into a Small Block Chevy that is going to compete, Rev up & Race to Win.
Smokey Yunick never took shortcuts on them.
Comp Cams XD Stainless Rockers should hold up for you.
Crower Enduro Stainless still 10 times better than all other stud mounted rockers .
Crane aluminum rockers are Good.
Only seen them fail eventual on Full drag race BBC with 500-700 nitrous hit shots.
1969 Camaro of Franks was on the back bumper on launch & carried out 200 feet.
Wheelie bars broke off it so Violent on launch.
Dana 60 diff I built for him.
I have extreme preduce for anything made in China.
Crap just fails at the worst time.
When on the road driving just can not tolerate accept it myself.
You want to use a Vertex Magneto.
You want to play hared like me.
All BS ends.
Punch it and race on the streets.
100 mph is just warming up the tires.