Small block strokers

IMO, unless you do something stupid, you will be just fine with the 727. Sure your car would be a little quicker with the 904 (1-3 tenths depending on who you talk to), but if you already have the 727 with a converter I would just use it.

For what its worth, I have had multiple 727's in my Barracuda in the past 20 years...with everything from a mild 318's, nitrous inhaling 360's, to my current 410 stroker...I never had a 727 blow up or bend a sprag, even after I broke a u-joint (on the bottle) before I passed the 60' marker....my bolt in sprag was perfect. Take care of your transmission and it will take care of you. I would suggest putting a blanket on it though....just in case.