well consider this... pac was shot on november 30, 1994 right? he's in the hospital until december 2, when he went to jasmine guy's house for better protection... december 5th he missed a hearing due to health concerns, and again on the 14th (when 2pac's physician issued remittance to the courts stating that moving him could threaten his compromised condition). he surrendered on december 23rd to prison.
if you look at the dates, at best he had a week of recording time by the time he was healthy enough to stand (or rap) and the time he surrendered. even that figure is stretching it since he was in pretty bad shape.