I dunn owhy either - im just throing around options - and hell the duratec still has one of the best noises EVER for an engine IMHO!!!
The V8 is kinda old school as well - but I dunno - would be kinda cool for a Duratech as well.
Bill sells the 3L short block for $500 and a decent 5.0 is around that as well - same ammount of fab work for the two - Just tossing ideas out.