johnbuzzed is right ; let's see this kit with transmission options as well as differential options , please .
The pattern for Revell is to start with the most visible, popular, recognizable version of the particular model year in question, so they're starting with a '70 Hemi 'Cuda 4-speed with a Dana rearend. No shock there.
Is an 8-3/4 rear going to appear in the future in a "lesser" version? I kind of doubt it, if the '69 and '68 Chargers and Darts are any indication of what we can expect. Yes, the Dart included an 8-3/4" rear from the get-go, but the '70 Hemi 'Cuda won't, so it would need to be a new part. Ditto for a bench seat, column shifter, Slant Six, plain "flat" hood, or any type of stock hubcap. I could see steel wheels, dog dish hubcaps, and a Go-Wing in a future modified reissue ('71 Hemi 'Cuda hardtop or convertible?), and I can easily see an AAR down the road, providing the much needed Mopar small block (and maybe a single carb'ed 340 as the second build option), but I don't see any '72-'74 variants being done by Revell.