I'm trying to find out if the crossmember from the 904 will mount the 727 YES

Are the Brackets from the 318 for the alternator and power stering pump the same? YES

Will the power streering pump from the 318 work on the 340? YES

Is there a source to get motor mounts for the 340? Used only as far as I know, but all you need is the drivers side engine bracket

I have a floor shift, with the linkage from the 904 hook up to the 727 YES