Can anyone identify this cam?

Whatever cam from factory 68’ 340. I’ve read 10:5:1 was stock then I’ve read how that was used as a scale and could not be indicative on all models prior to 1971+. As for head gasket was looking to just go with stock. Had the long tubes but getting rid of them for stock 340 and magnum manifold. I’m building this for my older brother who’s always wanted this running. He’s getting up there in age and just want to do a nice cruiser, springs don’t look stock but it’s not double. I wouldn’t mind staying with this cam if it’s doable with the 600 Holley carb and rpm intake manifold. Yes stay with hydraulic flat tappets. I am on a budget considering I have a family of my own and things are getting a bit expensive and a large part Will be going toward converter and transmission rebuild. I wouldn’t mind changing cams if it doesn’t require me replacing the stamped steel rockers since I’ve head high lifts making pushrods fo through rocker arms thus purchasing roller rockers. Again, my brother is in his early 60’s. I don’t think he’s going to go racing. If I stay with this cam what would the pro/con be from using performer intake 600 carb vs 340 victor jr 800carb aside from mpg?