It takes a couple weeks to get fully climatized and two or three weeks for your body to get used to the labor. If you can stick it out that far, you got it licked.
And if it took you 8 months to land even that job... its not like you got much of a choice.
Don't quit. Make smaller goals for yourself. DO NOT look at the full length of how much there is to do, you'll only discourage yourself. Instead only focus on the task most immediate at hand. If parts become repetitious, make up colorful names for those parts for a laugh. (just keep those names to yourself)
Me and Manual Lay-bore have been close personal friends in the past. I speak from experience.
