Driveshaft length??

http://www.moparts.org/Tech/Archive/axle/5.html

look like 2.26 inches...

you need to see what yoke you have on your driveshaft...and what yoke is on the 8 3/4

there is two sizes....7260 and 7280......you probably have the smaller 7260 yoke on your driveshaft...

there is a conversion U joint that lets you connect a 7260 yoke to a 7290 yoke...if needed...

or if the 8 3/4 has a 7260 on it....no conversion driveshaft is needed.