rad hose size?

Ok guys. I should have said before...car is 67 Barracuda. originally 273 a/c car. Now has a 360 based stroker 416 built by MRL. Old rad is long gone, Griffin sizes wont match my wp. It's 2in on INlet side. Don't have or cant find fitting for top hose to thermostat housing.
Is 360 waterpump inlet larger than 273?
Thanks in advance for any help!
cudamike