why doesnt limit offer ballbearing turbos for buicks? Any feed back on turbonetics ballbearing turbos looking to go with te 60 are they worth the extra money ? how are there street manners I am running art carr 3800 stall with 50# injectors casper thumwheel 206/206 cam champion ported and polished heads and reds duble pumper cars best is 11/15 @ 121 thanks for help mike lee itflies2@yahoo.com