rocker exchange

I run 273 gear and pushrods in my 340 with no problems...and yes, DO upgrade the adjuster nuts, got mine thorugh mopar(not cheap), or you will be under the valve covers once a week minumum...
make sure the rocker shaft bores and the shafts are not worn out...another good upgrade for this rocker system is the aluminum hold downs,also alvailable from mopar...they keep the shafts round and un-distorted...