should be able to just swap out the trans if bell housing has both bolt patterns. check you input spline count on the 833/435 before hefting the trans in place.

should be a direct swap if you have the correct wide hump floor pan. just need to cut the hole for 833 shifter on side of hump and use the 833 shifter boot/truck shifter/rods

you will have to scratch up a slip yoke/drive shaft the correct length as the 435 had a 2 piece splined slip yoke. 727 auto and 833 share the same slip yoke size when looking.

FYI.. sometime you have a 7260 at the 435 yoke and a 7290 at the rear yoke. when I build a shaft I use the same size joint on both ends. I prefer the 7260 u-joint as it was used the most by mopar and even behind some high HP cars. makes it easy when at the parts counter looking it up.