LOL 928? Is that the one with the 7 foot timing belt? Dime a dozen in the junk yards of California. Same with 924s 944s. They're all essentially worthless. I took a look at a 924S with 110k miles in ok condition for $1000 bucks. Needed a clutch. Walked away.
As for stuffing a diesel engine in one, I can think of about 100 more interesting ways to waste my time and money including slitting my wrists. 968s are just about the only old front engine Porsche that are still worth anything simply because they made so few.
