First and Foremost welcome to FTE!!

Not familiar with the 61-64 engine swaps; as with the 65-66, converting to a V8 is usually not as labor intensive. Ran a cursory search and came up with a couple of links on the subject, may want to run another search and suggest narrow field to the 61-66 forum. Likely a more knowledgeable member with the swap will be able to provide more info, again welcome to FTE.

https://www.ford-trucks.com/forums/4...storation.html

https://www.ford-trucks.com/forums/2...lp-please.html