Originally Posted by twotrout
what size are the freeze plugs on the sids of the block
Welcome the FTE. Asking questions on a 6 year old thread will get you nowhere.
On the sides of the block of what? A 391? 1 1/2" if so.
Best to make a new thread in the FE/FT forum, or google it. I found they are all the same for FE/FT, according to several search results from Dorman and others: