Heat/ AC Bulkhead Which One?

[Motown 454]

Hi Everyone, I need to pick up a bulkhead to use for a gen 4 Vintage Air system on my 69 Camaro. I am putting the bulkhead under the passenger fender where the fan used to be. I was wondering if the 4 port square or the 4 port offset ( sort of diamond shape)work out better? I didn't know if it makes a difference under the dash in making the hoses fit easier connecting from the inside unit. I would appreciate any advise or pictures anyone has or links to install info. Thank you in advance .
Wayne