Once again this is what I think and I've always been a safe distance from genius.
On plugs , It's just an old 302 without much of the H/O part so plugs are like a chevy vs Ford argument . Now a lot of guys swear by Champion and they are made in USA so that's what I use . Now as far as heat range take a look at how old plugs are burning and
decide if you want to go colder or hotter ( X reference whatever plug you have against Champion numbers and make sure you see how Champion numbers their plugs ) .
As far as Air cleaner anything that will fit on a 1980 302 will sit on engine . But as far as any performance goes you really need a fresh air intake especially considering how hot under hood temps get on the Aurora . This is my home-made solution that's not
so pretty but works well .
My focus is on performance and costs . The beauty of the Aurora to me was you could modify how you liked rather than worry about being original , but that's me .
Plus an "AC "logo is much more interesting than the very over abused Cobra logo