there are 2 issues here , it Should be possible to drill the belhousing to take the newer trans , the question is the input shaft depth which is easy to figure out
the second Issue is the strength of the newer trannys which Dakotas & 318 full size truck seem top be able to break with ease
a friend has a Viper T56 6 speed mated to his 440 , of course this requires major floor surgury to fit the beast in there correctly