I'm getting ready to drop the heads on my 351W and was wondering if any of the head bolts go into the water jacket requiring sealer?? It Doesn't appear to me that they do, but I thought I would check before I bolted them up.

 

Yes, put some sealer on the shorter bolts at the bottom. Mine leaked and I had to pull them out and put sealer on the threads.

 

+1

Use Permatex #2 on the threads on each of the lower head bolts.

 

Thanks. Heads are on.