A boys first broken pushrod.... LOL

looks to me like the push rods are to long...look at the one next to the broken one.it's to close to the rocker.you might be able to shim your rocker shaft, replace the broken push rod,adjust em all and go cruizen...

i hope so anyway...good luck!

i run those stock 273 rockers on a lot of 340s with no problems at all....i have a 69 340 i built 17 years ago with tons of drag strip passes and road miles....never even had to adjust em.