Thanks for all of the replies. I am waiting on a reply from Sean at Dynamic on their current 9.5 pricing.
I am waiting on the bill from my tranny builder, then I will be ready to buy the converter. My top choice as of now is Dynamic and second is the PTC unit.
Eight years ago I pulled my stock 11" unit and replaced it with the TA 10" Tight 3500 unit and I found out what stepping up to a good converter felt like.
I thank you again for the replies.

1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)