intake manifold selection

[nicelysedated]

I have a 396 block with 402 heads that are casting number 3993820. Are these heads oval port, chevy oval port, or large oval port? Summit asks for the stlye of cynlinder head and those are the options. The only info i can find on those heads is that they are 402 or 454 heads, open chamber, 113cc. Thanks

[stepside454]

large oval