Chuzie's '77 Project

[chuzie]

There is some helpful info. thanks.
Just took some measurements...

Beveled inner pressure plate from the forward clutch pack= .260 incl. bevel.

standard steel + clutch is appx .153

My clearance wiith the 4 pack installed (stock) was at .057.
Now with the modification subtract the original pressure plate (.222) and add the beveled forward clutch plate (.260) plus the new steel and clutch .153 would bring my clearance to -.134 which means I would need to machine the plate and take out .159 to make the final clearance .025. Now that will leave .101 on the modified plate, which is about 77% larger than the steel I was going to use to cap off the pack before you said something about it. That makes things much better in my opinion.

Now why did you choose that particular pressure plate for modification? Is it just easy to find or were you utilizing the bevel for something? I assume I will be machining the bevel off right? Detail if you don't mind so I don't tell the guy the wrong thing.

Oh wait, just did some more "research" and found that I could possibly flip the beveld plate upside down to cap off the pack without the need to do any machining. Is this true? If so, the meaurement of the plate excluding the bevel is .113 so all the math over again with this new number brings my clearance to .013 still out of limits so I would need to shave of, at the very least, .012.

So regardless I will need to shave an amount off of either the normal pressure plate or an extra from the fwd clutch pack so I may as well just use the normal plate and avoid purchasing an additional item. So basically looking at taking the original pressure plate down to .101 by removing .121 and that will give me .025 clearance with the 5th set installed.

now my specs call for C4 clutch pack clearance to be .050-.071 and C5 at .020-.050. what allows me to use C5 specs in this situation?

Too many numbers. My noggin hurts now. Your turn to check my math.

Thanks again for the help on this one. You caught a pretty big potential problem with my mod.