I ahve a T56 from a 2000 Viper. 3000 miles great condition have hydraulic throw-out bearing and linkage.
Asking $1250
Also have Weir bellhousing for early style SBC if you need it.
The Viper was wrecked. Motor and trans were still good just messed up body work so they parted it out.
I know kits are made to mate the T56 VIper to LS motors.
Viper T56 is just like the rest of them. Has better internal parts but will bolt up to an Fbody bell housing. Seems like you will need to change out the shifter as well. Do not take my work for it, call someone. LOL