Hi, better option is to swap a Toyota Supra 5-speed, R154.
It is bit more expensive but better rations and stronger. You just need from Dakota the bellhousing and throw out bearing and it's slider/input bearing cover.
Then some floor cutting, prop shaft modification, hydraulic clutch, also if you have 130 teeth flywheel you need to relocate starter closer on the bellhousing. And some small other issues.
I have been driving with R154 now three summers with a 5.7 Hemi and 350rwhp without problems.