Marty's right What are you going to do ?
You have an early oil cooler, 72 and later has a bigger inlet tube on the cooler. and to make it work you can saw it flush with end of the cooler, pipe thread it ,and screw in an 3/4pipe to -12 AN ,90 elbow . use some epoxy too. Or weld it. Thats the simple way. But you need the later oil cooler.
Dan Root, uses your cooler saws it off and slides the hose over and clamps it.
Works ,but there is better ways .
Someone makes a machined piece that is welded to the end of the cooler.
Find a six cooler. But You have a Vellios tank that uses AN fittings,so thats a problem.
Have someone weld a AN -12 90 to your cooler.
I am sure there is other ways also.
Do you know what chain tensioners are in the motor ?
you may want to look and make sure they have gaurds on at the least.
Its easy now with the motor out.
Hope this helps Jeff