1972 swinger turbo gen 3 hemi build

Yes I did notice a boss to drill but was unsure, I have a junk set of heads I was going to try with but decided to go the other way because I want to run the A/C and car style intake. The down pipe will kick out the wheel well and run out that way I will post pictures when I get it mocked up. I'm doing the four link and mini tub this weekend and might work on the rest of the exhaust too.