<Couple of things here.  First, as a Subaru Convert>

Forgot to mention, I too, am putting a Subaru engine in my '84 in the not too distant future, and I have the donor engine spotlessly clean, for the reason you mention below.  Jeff

<Second, I put a motor with 106,000 miles in there.  If anything starts to
leak, I want to see it as soon as it starts to happen.>