What was this bellhousing on and will 11" clutch fit ?

[Racer57]

Its on my 70 383 Cuda with 4 speed. Presently there's a 10.5 pressure plate/clutch and I would like to go to 11" if I wasn't gonna have to change everything else also. I forgot to count teeth on flywheel but it only has 1 set of holes for pressure plate.

Part #
2892513

Its possible that the second 2 is a 3, its hard to tell.

[Chryco Psycho]

I assume the belhousing is Alum ?
 It should be for 130 tooth system / 10.5" , the 10.95 uses the same bolt holes as the 10.5 "