1971 Duster 340 4 speed numbers matching

Mike,
The rear is the original one. The gears were changed to 4.30. As far as I know 8 3/4 A bodies never came with large bolt. Thanks forgot to add that. Some engine bolt ons are not original.

Right, I was checking to see if the axles had been redrilled or replaced entirely. They are LBP correct? That's what the ad says.
4.30 is steep, but maybe those can go in the other 8-3/4" I just bought from you lol.

What can you tell me about the engine? Factory rebuild or is it pretty wild? Any specs you might have would be great. Simple bolt ons like intakes and air cleaners are fine.
Thanks

-Mike