On my sm420 to T5 conversion behind a 56-235, I used the RCF-4201 disc and the stock pressure plate that was with the sm420. Make a visual check of your new pressure plate against your old and I think you'll find it identical, other than the diameter.

Just a suggestion, after modifying your input and throwout bearing carrier shaft I'd be sure to use an air cutoff tool and just slightly extend the splines. I didn't the first install and had drag on the clutch. You only need the have the pressure plate slide back another 1/8" to make it totally free from drag.

I put some pics in my website. You might want to check them out and save yourself so hassle.


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