i have an 82 bronco with an inline 6 with a 4 speed hwy gear tranny and was wondering if anyone knew if a c6 or aod automatic would fit in place of the current tranny?

 

300/302/351W all use the same bellhousing pattern. Flywheel/flexplate is another story.
300 is internally balanced, and the rest are externally balanced, so the flywheel for a V8 will have a counterweight, the I6 flywheel won't. so yes a AOD or the later 4R70W electronic version of the aod with better gear ratios will fit

Check here for part numbers for the flexplate and some "info"
https://www.ford-trucks.com/forums/96...-flywheel.html


Try over on the ford six forum Im a member there as well but I dont know as much about the big six 240/300 but i can get you in touch with the guys there who know if you have any technical questions i know who to ask.

if you were talking the ford small i6 (144,170,200,250 or the australian ford 221 or crossflow 250) then I can be of assistance as i have run all of those at some point.

got a 200 right now in a 65 mustang with a rollerized c4 transmission good to 800hp with a mild stall. the head is a custom aluminum intake with plenum and rare two barrel vintage holley made for the austrlian 4.1l I6 with a gt35r tubro and im looking to get 835hp from it.

 

So,m you are wanting to get AWAY from the 4-speed in favor of an automatic? On earth why?

 

That highway 4 speed (The SROD I'm assuming) is a piece of junk, but I'd put an NP435 in its place. It'd be a direct swap and less of a hassle.
The NP435 is an absolute tank.

Secondly, the 300 + C6 is a very robust combo, but the C6 is a power suck, and the 300 would be very sluggish behind it.

 

You will never get 835 hp from a 200 6 with a 2 bbl. Dont matter how much boost you try.