Replacement 68 340 four speed cams

I'm "cam"inally challenged, so to speak/slur. These were one of the "best " sb factory mopar cams correct? My 340 build will have oem 273 adjustable rockers and I would like to go solid flat tappet.
By doing this, how(if any) will this alter the cams "performance"? Will the cam specs need changing to a solid?
Thanks
Back in the day, this WAS a pretty good factory cam.
But, IMO, Today, for street performance, you can do better; unless yur just after the sound, but then you would also need the 340 exhaust.