Ok need some help here. I have a 70 RR/ 383? and a A833 18 spline and a 11in. clutch. To the best of my knowledge this setup is for a 440 or 426. The reason for the question is I am having a hard time finding a reasonable priced clutch kit. The info i have found is that a 383 came with a 23 spline transmission. So now I am a bit confused. P.S I was told the car had another 383 installed at some point and am now questioning whether its a 383? The motor is off for refresh so I don't have the number off the block.