My small bolt pattern 7.25" rear is 57.125" wide. a dakota will be way too wide for an A body, they're over 60" wide, and the spring perches would need to be cut off and rewelded.
the closest easy to find latish model rear end that is close to the right width are 93-09(?) ford rangers. they're 58.5" wide. 90's to early '00 ford explorers are 59.625" wide. both need spring perches cut/rewelded.
the closest mopar product is an XJ cherokee, they're 60.5" wide, and 3.55 geared 8.25's are common in them. to get any real width as far as tires with that much width, you'll probably need high offset wheels, somewhere in the +30-+38mm offset that mid 90's-mid teens mustangs had.