how much would it cost to replace the engine of a 1998 c-70 with a new one

Unless you can find one in a junk yard CHEAP and replace it yourself, financially I wouldn't recommend it. The value of the vehicle is barely worth more than what it would cost you. Unless it is a sentimental thing.

A NEW engine?! Go ask the Volvo parts department- if they have one, better prepare yourself for the shock-

thank you, i am not concerned abut cost, whatever it woud be.

Used, maybe 3500 plus...new or refurbished over 6000 easily. Just for the engine. No labor.