this is my opinion and my opinion only so don't get all pissy on me but to me it kind of seems pointless to try to do a tune up to an engine that has just about had it...Your engine will last you another 6 months or so till you are able to get a new engine...Now lets be reasonable here, all the money your spending on your "BLOWN" engine you could of been close to half way there on getting a new one or rebuilt engine....If my engine was about to go to the "GRAVE" then I would not put anymore money into it, instead I would go ahead and save up and get a whole new engine or rebuilt engine which would more than likely be alot less money than trying to keep it running till you have the money for a new one or rebuilt one....

I am sorry if I sounded a little rude but take it how you like it...This is just my opinion!