Well, 5 weeks was enough for Jonesy to run 2:08 and his half marathon pr was pretty close to the 61 Ritz recently ran. Still think Ritz will run around 2:11 Monday.
In his five weeks leading up to his 2hrs 08mins 05secs World Best run in Chicago in October 1984, Steve Jones clocked up weekly mileages of 100, 84, 71, 71 and 100. Here is a reprint from his training diary relating to the details of his final three weeks.