George, I think you can use the stocker, but you might need to modify or bend the bracket some. TA Performance sells a dipstick/tube with a separate bracket
Hi George, AM&P has what you are looking for.... http://www.automachperf.com/Buickperformanceparts.html "Replacement dipsticks and tubes Available for Stage 1 and 2 455 engines in either regular or NHRA approved locking style" I personally have the Stage 2 NHRA-approved locking style for my Regal...:TU: Hope this helps....