10.5" flywheel for a slant 6?

@toolmanmike,
I have two complete A833OD setups from crank to driveshaft. One I just pulled for a rebuild in my 82 D150, the other reportedly is from an F body but that one came from everyone's least favorite forum member so anything he told me when he sold it to me is highly suspect. However, your part number of 2128290 matches the one out of my D150. The supposed F body one is 3878965. They measure the same, so I'm guessing they are interchangeable. The clutch out of the D150 is a 10" and I don't see how anything bigger will work. The pressure plate holes are only about 10-5/8" CTC, kind of negating anything bigger. I agree, your flywheel is for a slant. I forgot to check bellhousings, but I have both of them. I'll lay them out side by side tomorrow and let you know if they will interchange. I took photos of all this crap but I did it on the phone and it's not playing nice to post here. I'll give it another go in the morning.