So C8AE-H are arguably the lowest performing heads on an FE, although in mild applications they do fine. Very few headers fit them and be prepared that the ones that come with them may not, even if someone used them.
The exhaust port in relation to the bolts is about 1/4 inch lower on C8AE-H heads, so there are gasket sealing issues with a mismatch if it's the more common CJ/early port header design.
Look close, and I would also expect Fairlane headers to NOT fit, although there were some listed in the past, most don't fit both