well, thanks for the guidance. here are some pics.
my partner Pete
the new KOYO radiator that i got from ebay go-part auto parts
here's the radiator hole
draining out the Greeeeenn
got the green out using the flush method
Pete starting the out of car fan swap over
almost
and it's all done.
nah not to hard but was real scary thinking something would go wrong. but easy as pie. feel very confident that all is right now. thank you all