Need advice on finding trans parts and what will fit

Keep checking the for sale forum on here, correct pedal assy's show up and your local Craigslist and Facebook market place also have pedals and an A833 4 speeds show up now and then and if you go with the overdrive 833 the bellhousing is different than the non overdrive do to the front input bearing size, overdrive 4 speeds started in 75 I believe but you can use an earlier non overdrive, as lenky1 stated above Brewers has a lot of info and parts on the website (good reading) good luck