Twister is new to the forum

Hello to all, I have been into old cars all my life and have tons of experience in many area's including, buying, selling, restoration, design, transporting but never in a Mopar until now. The closest I came was owning a Dodge Diesel Dually for a number of years to pull my trailers. My dad owned a 66 Newport and a 76 Volare in his lifetime, if that gets me any Mopar points.
I have recently purchase a 72 Duster, very original with a slant 6, automatic and color combo of yellow/black (twister) with a green interior.
I'm looking for ideas for a drivetrain transplant, possibly using a 5.7 hemi for all around drivability, reliability and :burnout:mileage.