Help evaluating this car...69 DART

I am cringing at just putting an xploder 8.8 under my kids barracuda, but A body 8.25s are non existant out in my area anymore, and after spending $1,300 to piece together an 8.75 for my 67 i said no. Economics dictated that. Going economical route for his car. Will still be putting a 318/A904 combo in it. Still going to have a mopar engine and trans.

Nobody ever looks at the rear axle and says what is it but they do that with the engine because most people at car shows have the hood popped