It will not be what you think.You have a bad mismatch in parts. The dart 230 head is more suited for a 400 cid engine. The heads will support 600 Hp but you are way under camed for those heads.The car will be lasy on the street.
You should be running a cam at least with .600 lift with a victor jr. intake your carb is ok and you will need gears and a coverter.
If this is a street car you would be better off putting them on the shelve and putting on a set of 180 cc or 200 cc runner heads with the cam you have.