Need help with 352 info

I recently purchased 65 galaxie 500 conv. with 352. Owner stated it had 352 interceptor motor. I cannot find any information that supports this was available in 65. The motor in car apears to have a factory four barrel intake with holly carb. Any info that can help me figure this out would be appreciated. I also purchased some 390 heads, does anyone know if I can use them on the 352.

Thanks