[superninety]

Variety is the spice of life, they say.

I did this job recently on my 3.6 along with lots of other seals. I did use an aluminum model of expandable oil return tube, and my Indy was supportive of that decision. Decades of air-cooled experience in that shop.

Make sure to use some lubricant on the o-rings or they definitely will not slide. I used Dow 111, as I recall. No issues on assembly and no leaks after a year.

I pulled the heat exchangers for access. A proper torch on the fasteners, getting them cherry red, and the four that were not already persuaded by penetrating oil, came right loose. In my case, much ado about nothing.

That's my experience, your mileage may very...