[Cglrcng]

Yac they should be on the NHRA Accepted Products List (if there are any currently accepted), NHRAracer.com on left, under TECH heading, Accepted Products List...Scrolled the list contents and only found Stk/SS Accepted bellhousings 3 there and all GM and all were JW Transmission and all on Pg 54. No heading there for Accepted Adapters so a call to the tech department may be in order.

Or, call JW Transmission, tell them what you want to (adapt or matchup), and they certainly know how to get it added to the list.