No longer have my 66 Mustang, but i bought this clutch and mounted on my non-stock DeTomaso Pantera, but ended up being the wrong clutch/flywheel. Engine was never run. I paid $1,100 for it in 2022 and it currently sells for $1,045 on Summit before taxes. My loss is your gain. I do NOT have the plastic alignment tool, but those are pretty cheap to find. Will ship at buyer's expense.
Specs from Summit:
Manufacturer's Part Number: 430103C
Clutch Usage: Performance
Clutch Disc Quantity: 2
Flywheel Included: Yes
Input Spline Quantity: 10
Input Shaft Diameter: 1.063 in.
Disc Diameter (in.): 10.500 in.
Disc Diameter (mm): 267mm
Disc Material: Organic
Disc Style: Full face
Hub Style: Unsprung
Pressure Plate Style: Diaphragm
Throwout Bearing Included: Yes
Alignment Tool Included: No
Pilot Bushing Included: No
Flywheel Material: Billet steel
Ring Gear Tooth Quantity: 157-tooth
Flywheel Bolt Quantity: 6
Engine Balance: Internal
Counterweight Assist: No
Mounting Hardware Included: Yes
Quantity: Sold as a kit.
Notes: Street Twin double disc clutch kit for vehicles up to 1,200 horsepower with cable clutch linkages.

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