200-4r will bolt up to your stock tranny crossmember. TV cable may be an issue to get all the way over the the other side of the engine. I don't believe you have to shorten your driveshaft even for this, but I'm not sure. It will require a BOP to GM adaptor plate. Consider very strongly going to an overdrive trans. There are too many interstates nowadays not to.

"The first rule of overkill: You can never have too much overkill."
"Overkill is underrated."