Replacing the clutch on a 1960 GMC, SM-318

[Corts60]

Hey all, I am in the middle of replacing the clutch on my Jimmy and thought I would start up a thread for info for everyone else. I ran into a couple issues so far. Hopefully I'll take care of all the trial and errors so if any other GMC guys are going to do this, they'll have the answers.

I think everyone is aware by now that I run the original 305A V-6 and SM-318 3-speed. I was getting a little chatter when taking off in first or reverse, so that is why I decided to change out the clutch.

Everything came apart nice and easy. I have a one piece driveshaft, that made things easy on that end. Then I removed the transmission from the bellhousing. Now, the bellhousing on the V-6 incorporates the rear engine mounts. There are no tranny mounts on this set-up. To remove the bellhousing would require the removal of the starter, slave cylinder, rear engine mounts and of course the bolts to the block. I opted to leave mine in for now.

I did, however, remove the rear mounts when I saw cracks. Yup, they were both cracked and broken. If you've never seen these type of mounts, they are very different from the other trucks (see pics below). This is where I ran into the first problem. NO ONE makes these mounts anymore. So, I am ordering a set of later model mounts from classic parts (P/N 79-111) that should work. I think jbgroby did the same thing?

So, I'll shut up and start showing pictures:
Here are the mounts in place

And here is one of the mounts by itself


and here is what I am going to replace them with
http://www.classicparts.com/1954-84-...ctinfo/79-111/