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
Hello, by a stroke of luck and timing, I purchased an early removal 68 340 four speed cam from a retired Chrysler engineer who owned the cam since late 68/early 69. I also was able to get the original blueprint. I happen to be friends with the owner of Racer Brown Cams and we talked about making a run of these. We checked the cam on the cam doctor and it has been confirmed 100% authentic and almost all of the lobes have zero wear. I'm just curious about how many of you would legitimately say you would like one and follow through with payment. I will front the cost of making the masters so no up front cost to the buyers. Overall, the final cost for the cam (without lifters) would be $245 plus shipping. If you are interested and would be committed to buying, please reply below and add your name to the list. Thanks for your interest.