302 heads

I'd like to see a late 80's smallblock factory 4V manifold with 318 sized ports, all the ones I have ever pulled were the same as the 360 with slight port overlap, which doesn't hurt anything. Not saying they don't exist, I'd just like to see proof with a casting number and pictures.
The regular Performer 318/360 has got 318 sized ports, and the offset water neck needed for late model stuff with the Denso A/C compressor.
alan627b