The motor is bad in my 96 s10 blazer. Its 4x4 push button, 4.3 w code with 4l60e auto transmission. My dad wants to either get a used 4.3 to put back in it, or a already rebuilt jasper unit (if they have them). My question is, would it cost that much more to put an LT1 in it? what would you guys do? thanks for any info