What cam to use in 340

I would run the comp 268 its a real good street cam. But between the three you have and the ones your looking to buy I see very little performance difference. My dart engine is similar to yours. 340 speed pro forged pistons about 9.8 to 1. rpm intake. 750 holley. headers. 3.55s. and 2200 converter. With the mp 280 474 best time was 13.15, Changed to a lunati 276 voodoo ran almost identical times within a few 100ths. Then put in a hughes solid 237 and 242 at .050 and .534 .542 lift. best et went to 12.93 . So I don't believe in magic cams. I think the hughes picked up because it was a solid design. I have no problems running a solid on the street. I adjust valves once a year and there rarely of more than .002. So if I was to buy new I would go solid.