Cool build, although somewhere down the road you are going to kick yourself for not stretching the wheelbase over 100". You'll find 89" is still pretty short for any sort of ledge, hill climb and for rear driveshaft angle.
I thought about doing your type of build before I cut my flatty in half and made it 108" wheelbase.
I think you should add a bit more tech as to how your built your frame as far as:
I think that's important since that is a topic that gets covered a lot
Otherwise this looks like the start to a cool build.