Cheapest overdrive options? A833od? 200r4? T5?

I have a 67 barracuda it's my daily driver...
Has a warmed up 318 and 904 and 4.10 gears!

Looking to swapping to a overdrive and do not have $2000 plus to spend...

I'm thinking the cheapest would be a A833od... Steal all the pedals, linkages, bell, etc to swap right into my 67 barracuda...NApa flywheel n clutch.. Or am I wrong?

Is there any other cheaper options?