66 clutch

[WSJOHNSON]

Hi,
I just got a 1966 GMC 305 with a V6. PO removed the clutch and 3 speed trans.
PO may have installed the wrong/bad pressure plate. He Installed a SM420, looks like the pressure plate is stuck, 1000 pounds will not move the fingers.
I need a 11", 10 splines. 1 1/8 dia.

I spent hours looking for a clutch kit, but no luck for less than $300.
Please let me know the part number and a place to order.
What other models and years are compatible?
My second choice would be to buy a used one, if I could find one.
Any help would be great. Ordered ball bearing for flywheel.

I'm new to this forum and finding GM parts.
Thanks,
Wayne in Gilroy, CA

[LEWISMATKIN]

welcome wayne to the forum. The kit you are looking for, p/n 04-528, is made by AMS and can be found on ebay, rockauto, and several other on-line sellers. it sounds like the PO put in a CHEV clutch kit will not fit.

[WSJOHNSON]

Looks like that is a 12" clutch.
My flywheel holes are 12-7/8", are you sure it will fit?

AMS AUTOMOTIVE 04528
Pressure Plate Size (in)12
Disc Size (in) 12.000 X 1.125 X 10T

Thanks

[tbucketnut]

https://www.rockauto.com/en/catalog/gmc,1965,1500+series,5.0l+305cid+v6,1419409,transm ission-manual,clutch+kit,1993

[WSJOHNSON]

https://www.rockauto.com/en/catalog/gmc,1965,1500+series,5.0l+305cid+v6,1419409,transm ission-manual,clutch+kit,1993

Just ordered HP5552-1 from CARID, $194 + $44 tax and shipping.
Dia. 11", shaft 1.125", 10T. Fits 1966 GMC 1000, 5.0L, STANDARD TRANS.

Thanks for the info.

[LEWISMATKIN]

Ws, thr clutch you ordered will not fit the gmc v6. The p/n i referenced, 04-528, is the only clutch that will fit thar flywheel. I worked for napa for almost 25 yrs and for my family's shop for 21 yrs prior. I have spent my life in parts. Please listen to what i am saying.

[BobBray]

Platinum Drivetrain 04-528 is once again available from Rockauto.

[BobBray]

I tried to order the Platinum Drivetrain 04-528 and was told today it still isn't available. Sorry for any confusion.

[beerman]

Search P/N 04-528 on Rockauto they are showing AMS Automotive and M-PACT

I picked one up last month

Can anyone verify that it will work?

[Funky61]

I got the same number from Perfection Driveline direct and it looks just like that, but comments from others said to pass, as the hub hangs down too far.

This thread has the correct answer that fits and works;

https://6066gmcclub.com/showthread.php?t=51743

[LEWISMATKIN]

yes this the exact style GMC uses fir their clutch disc!!!!!!!!