74 duster 440 swap

looking good there man .. im putting a big block in my 70 was going to do it with the 72 dart but was told its a little heavy so light a body will be where we go...are the small block and 6 k member the same in the 74??? if so would you be getting rid of the motor mounts...mikepm me if you like im outside of raleigh nc

From the research I've done a big block with all aluminum bolt ons and battery in the trunk will weigh less than an iron small block with ac and power steering. The k members are different. but you can buy motor mounts to fit a small block on a slant 6 k.