I’m putting a NV4500 from a GMC 1994 6.5 on a ISUZU 4BD1T and I need technical info about the GMC 6.5 single masse flywheel.

As you can see on the picture, my friend modified a GMC truck flywheel and he put it on the ISUZU flywheel for me. We had to do that because the NV4500 input shaft was not long enough.

Now, we are about to install the clutch disk and the pressure plate on the GMC modified flywheel.

My question do you is : Do we have to make a step level lip all around the flywheel? And if yes, what is the step level we have to make?






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Maybe you don't understand my question

I need to know if the manual flywheel surface is uniforme (on a 6.5 single masse flywheel) or if it has a stepdown level where the pressure plate bolts.

Please help me...