Benzmac would know ultimately, from what i remember from rebuilding mine is that the undercarriage and transmission mating- to- engine arrangement means the whole engine and trans has to come out if the crank indeeds to have to come out. The timing chain might as well be replaced when the crank is taken out. This might run you equal to the price of the car.
When my engine siezed last year I was 39 & rebuilt it myself but that was more an act of passion and a prelude to turning 40. Right now I barely have enuff energy to make it thru a day.