Beater,
I am not saying Tlowe invented the OD swap,I cannot remember when I heard about that swap a long long time ago,, he seems to be the only one here that probably has these tranny & ODs lying around so we could see some pics, that's all.
With the more modern manuals trans readily available ,personally I would more likely get a 5 or 6 speed trans..
But they cost $$$ & more often, we choose the low dollar route.
MBHD