I have an NOS Ford Motorsport high drum in the original box. The snap ring groove placement "looks" like a 4 clutch but these were sold as 5 clutch. Is that possible? I compared it to my used "original" CJ 5 clutch drum and saw the difference. I didn't test fit it for 5.
Randy
If early spec. and you end up wanting to move it, let me know.
High clutch drums.... any fit any year, only difference is the number of clutch plates.
General rules...
A 3 plate drum can be converted to a 4 plate.
A 4 plate drum can be converted to a 5 plate.
You CANNOT convert a 3 plate to a 5 plate.
The conversion is easy.
Take your 4 plate drum and install 5 frictions and 5 steels. No top pressure plate yet.
The stack will be very close to the snap ring groove.
Use a spare FORWARD CLUTCH bottom beveled pressure plate upside-down on top of the stack, and then install the snap ring.
Same for a 3 plate to 4 plate. except of course, only 4 friction plates total.
Alternatively you can cut/machine a new snap ring groove higher in the drum to get an extra plate and still use the normal top pressure plate.
This works for 3 to 4 and 4 to 5.
If you have a 3 plate drum and try to cut a snap ring groove high enough to install 5 plates...
... the second last steel plate will get hung up in the original snap ring groove and..... carnage! You don't want that.