I have a Saginaw with 2 lines on the input shaft...How will it hold up with a 327.??? Thanks

 

I should ad that it's a stock engine...

 

Depends a lot on how you drive it,just regular driving around it should be fine.
Doing a lot of burn outs and hot rodding or going to the drag strip don't expect much life as they aren't a very tough tranny.
If it's not installed yet I'd look for a T-10 or Muncie instead.