I seem to be missing a plug does anyone have pictures of all the plugs on a 351W this is a 1991 block that was worked over by a friend of mine there were bolts on the rear gallery holes if my memory is good I think I should have 19 but my count leaves me at 18 what am I missing guys?

 

19? ,I got 3 in the back ,3 in the front ,1 on the top rear,3 freeze plugs and a small block drain plug on either side.

 

I counted the heads as well.

 

You have 1 freeze plug in the front and back of the heads, and 3 threaded core plugs between the valves,and then there`s the holes for the cross-over tube thats threaded if you need to block it.