Help! Headers 67 dart 340 brodix heads

From the info I found, the SB Brodix heads come un-drilled on the exhaust side so they can be drilled for headers for W2, W5, or W7. If yours are drilled with a W2 pattern, TTi makes a header that will fit. So does Hedman. Neither are cheap. You could also just get the ones you have fixed and recoated if they already fit.
These are the b1bamc heads, they also make a different set...