Need 4-speed Help

pettybludart - Thanks for checking in. With offset dowels, able to get the SS/plate to lie flush against the block and measured within spec. Upon testing, the shifting problem seems to have gone away, but the slipping was still there.

Went up to the Good Guys Swap meet and found a stock bellhousing and ended up chatting with a fellow Mopar guy. He wanted to make sure I was buying the correct bell for my trans.

After describing the problem, he gave me that quizzical look, like I'm sure most who have read this thread have had, and ask "Are you sure it isn't the rear end?" Also, as fstfish66 has asked. Asked if he had any advice on how to test and he told me to jack up one side of the rear and try and turn the tire by hand and if it turns, the clutch is bad in the posi unit... Sure enough!! The wheel up in the air turned, along with the driveshaft, but the stationary wheel didn't.

So, looks like the squealing and slipping was the rear end, but I would have, and did, bet money that the noise was coming from the trans/clutch. So, the trans/clutch and shifting problem is solved and now it's time to read up an learn how to rebuild a 489 posi clutch unit. Also, may change out the 323 for 410s while I'm at it....