355 clunk in rear

Hi all, I picked up a '95 355 a little over a week ago and have put around 1200 miles on it and it's been running great. However, I have a clunk in the rear end that happens if I crack the throttle quickly or do an aggressive full throttle 1-2 or 2-3 shift and I can't figure out the cause. It doesn't happen at all in normal driving, only if driving aggressively, though I can get it to clunk if I let off the throttle completely and quickly open it again, but it's much less severe. I did a search and all I could find were clutch shaft issues on early 348's or possibly clutch bearing issues? It feels like motor or trans mounts, but I inspected them when it was on a lift for an alignment and couldn't see anything obvious. The boot for the shift rod was touching the frame cross member which didn't look quite right, so the mounts could be sagging. Does anybody have a picture of that area so I can see if mine looks out of whack? Has anybody else had this problem? Any ideas on how to further troubleshoot? I put the car in 4th and rocked it back and forth but couldn't hear or feel anything. The car shifts fine and doesn't make any strange noises. The clutch does not slip at all and doesn't chatter. There was no detectable suspension slop when aligning the car. The car had an engine out a little less than a year and 3k miles ago. I'd like to take care of this over the winter if I can figure out what it is. I'm not averse to pulling the engine/trans if I have to, but want to make sure I've found the problem before I do that.

 

Just thought I'd check back in, jacked the car up as the clutch started squeeling like a stuck pig and sometimes goes to the floor so started taking the car apart. While under there I inspected the motor mounts. As expected, they're completely shot. Oddly enough, the trans mounts look fine, though. Now I have to decide whether to go with the stock mounts or upgrade to challenge/550 mounts. I'm also hoping I get can the T/O bearing rebuilt but have to get it out first and verify that's the problem...

 

That's the plan, do they still do it? I just got it out of the car and the TO bearing is definitely the problem - I could barely turn it by hand. Everything else looks fine, so I guess I'll give them a call tomorrow (if they're open).

Now I have to decide whether to put the Capristo back on or put the stock back on and sell it. Is the Capristo worth any power or is it just sound? I have test pipes, everything else stock. Weight wise they feel about the same, so if there's no performance gain I'd just as soon sell and get some challenge rims and track tires.

 

Sent it to spherics today, hopefuly it's rebuildable. It will still turn but is very rough. We'll see what they say.

Undecided on the exhaust, but if it's worth some power I'll probably keep it and wait on the rims. I have to decide whether to replace the front tires with another pair of dunlop sp 2000's to go with the practically new rears or replace the whole set with pilot super sports.

 

In the meantime, here's a pic of it apart.
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No issue with the air tools or the stool with the handy tray on the bottom so I don't lose any hardware? Next time I'll be sure to pull it out into the gravel driveway and use only the included tool kit. Concrete is for sissies, try dirt or gravel where you really get bruised up and if you drop a nut or bolt you lose a half hour looking for it.

 

Not lost on me, I was also joking