6L6 & El34 running both.

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so I understand to run el34's in a 6l6 amp, you should change out the screen grid resistors to 1k, and adjust the bias and ground pins 1 and 8. (I hope im not missing anything)

but what if you want to run 2 6l6 along with 2 el34, would it be safe to just ground pins 1 to 8 on the sockets that will run the el34's and still replace the SGR's?