302 Intake on 289 engine?

Should be OK. The 289 & 302 are the same topside.

If you have 351 heads on a 302 (or 289) then they require a different gasket as the front water passage is different.

It'd pay to get a phenolic spacer for the carb, keeps some heat away. You'll obviously also need an air cleaner base to suit the 4 barrel
 
289 and 302 are the same everything except the minor internal difference. anything on a 289 or 302 will innerchange externally. think of them as the same engine as far as this is concerned. thats why the intake is called the performer 289. :) even if you have 351 heads on a 289 or 302, same intake, its just the coolant passages can be slightly different, but thats the same as the later 302 heads being different too. most gaskets have a cutout that you discard if you dont need it.