header help

gulp. i know this is going to be dicey. the removel with a sawsall sounds good. i'm toast if i have to loosen the motor if its more than a mount. if the tti's fit without tearing the motor out then i don't care what they cost, other wise i'm hiring it done and will spend the $ on labor instead of headers. i'll still have to pay for the final piping. if someones done this to a 70 dart can a basic novice do it? thanks don