833+magnum?

May be a dumb question?
But I have a 69 dart (2dr) and it's orig a 6cyl 3spd on the tree and I just picked up a complete (-trans and t-case which they're for a 4x4 anyway) 99 ram 1500 sport.
I'd like to run an 833 4spd but will that trans bolt-up to a 5.9 magnum and which flywheel?
(Or do I have to run a newer manual trans?)
I know if I was running a 727 I could just elongate a flexplate bolt hole and I also know to run a newer trans I'll need to modify the trans cross member.

Planning on a complete swap with everything into my 69 dart.
Thanks for any info guys!