18 spline A body 4 speed

67_Slimer said

I definitely think it's my clutch setup but why does Brewer's try and tell me my 23 spline is only good for 450hp? They were more or less pushing the 18 spline.

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Not sure why they are saying that but I’ve run more than 700 hp through a 23 spline 833.

If you are killing 23 spline boxes your clutch is garbage.

Before I spent one cent on a gear box I’d buy a clutch that won’t break parts.