Yes, I know exactly how much it will cost. I just had a 3.8 Jasper put in the wife's 1996 Windstar in May. Total mechanic bill was $3843.67. That included the Jasper installation supplies kit, which I'd highly recommend. That kit was a bargain versus buying all the stuff piece meal. Be advised that the 3.8 comes out through the bottom of the van, with the transaxles and wheels and all still attached as an assembly. It's quite a project that really should be done with the aid of a lift to raise the vehicle up off the disconnected engine assembly.