Now that I have the exhaust system done , the headers have a crack

my tti headers were cake to install. just follow the directions. ground clearance is awsome , plugs are easy to get to and have had no issue with leaks. nice thick flanges. .
Of all the dart headers IO've installed back 35 years ago nothing was easy . Do these Tti just drop in or is it time to take apart steering , lift motor and have a basball bat and hammer at the ready ?
Do you think I can just change driver side as passnger side is fine , no dents or cracks , or do both sides have to be done .. Not sure the brand in now , but they look like SS or chromed , not sure . Will take picture later , maybe someone can ID them
Shorty headman look good , but don't want to change the starter