318 LA rebuild after losing a valve seat

George Jets said
The only other area where things may have went wrong is that a rod bearing cap off of one of the other rods got place on a rod that it did not originally come off of. That will raise heck with the bearings not fitting the crank journal. Definate No No.

You need to be 100 % sure that this did not happen. Otherwise it's back to resizing the large ends of the rods again.

Try rod # 6 for a test fit on the crank to see if that one fits looser. Try to find out if just one or two of them are tight, or if they all are.

For the sake of conversation lets say that you got 2 of the rod caps installed on the wrong rods, let's say rod and piston #1 and #2.

Now let's say that you test fitted all the other 6 rods on the crank journals, snugged up they moved freely. Rods 3 thru 8.

So let's say Rods and bearings 3 thru 8 all fit correctly and move freely.

But Rods #1 and #2 fit tight yet. OK now you have it narrowed down to the problem at 1 and 2 fitting tight. So swap the rod cap from 1 and put it on rod 2, then the the rod cap from 2 snd put it on rod one.

Now test fit the 1 and 2 rods and bearings on the crank journal again to see if they have loosened up and move freely, if so you should be golden.

This test is called "Process of Elimination"
See what you can figure out, see if you can get it freed up.