So on a KA650 (uVAX III (2.8 VUPS)) doing this:
date >> log ; make depend ; make ; data >> log
gives this result:

chuckvax# cat build.log
Sat Nov  6 23:29:19 PST 1999
Sun Nov  7 05:46:14 PST 1999

6hrs, 17 minutes for a complete kernel build. (So a uVAX II (KA630 @ 0.9 
VUPS) should take at least 19 hours to do the same...)

--Chuck