heater core

[Slowgoin]

New to the site, so hoping for some help. I removed an old heater core from non-ac 67 C10. I installed new exactly the way the old came out (even took pictures), but now realize it's probably upside down. The 5/8" tube is now on top and 3/4" on the bottom. I think it was reversed from the factory. Will it make any difference, so long as I properly route my hoses? I would route 5/8" from intake to 5/8"tube on core (now on top) and 3/4" from water pump to 3/4" tube on core (now on bottom). I read elsewhere that someone had reversed theirs on purpose to avoid the crossing of the hoses. Hopefully I put this thread where it belongs, if not, would someone please let me know. Thanks for the help.