Need help with Insane 340 setup.

just looked at my stockpile of rockers...

I have a set of 273 mechanical rockers that have 308 stamped on them...so I would say they are 273 rockers.
Yeah, my 71 340 has 360 J heads and they had 273 rockers on them when I bought the car 13 yrs ago still running them today....they have 308 stamped on them too...

But I have no spark at the moment.....#-o