Cams for 318's

Really hard to find one of these since almost every 318 and 360 came with a 2 barrel here, and 340s are like a unicorn.

Still thinking if summit 1798 or 6901 cams will make me loose power. Don't want to spend money on 6900 and then realize I got a preety small one.
Think of it this way, if you put too big of a cam in you don't have any other parts to make it work. I wouldn't go too big with a 2 barrel, stock torque converter, and unknown rear gears. It all has to work together. The intake and carb will work without the cam but the cam might not work well with the 2 barrel if it's too big.