Are you saying you could put that 268 cam into a doesn't haveengine with stock valve train and springs without any harm?
Looking for a slight extra bump in mine without doing a complete tear down.
Ron
The recommended valve springs for the XE268H are very similar to the factory 340 valve spring pressures according to the CompCams catalog and the Mopar Performance Engines book, so I feel it would be a good modern cam as a replacement to a factory 340 cam.
The next cam up the XE274H requires double valve springs which the factory 340 doesn‘t have.