they can be in high horse power applications and when trans brakes are used. the tail shaft is what supports the front of the drive shaft. I am sure there are a ton of people that have run the light duty tail housings with zero issues but i also tend to think that the Chrysler engineers wouldn't go thru all the trouble and expense of designing a stronger unit if there was no benefit. I am just trying to build the strongest unit i can. the truck trans with the rear housing i have are very plentiful and cheap. so if a person were looking to build a core then why not start with a stronger unit to begin with.
I will also state that i am in no way an expert. I could very well be talking out of my *** here. lol.
