Tube in back of heads?

jstang209

20+ Year Stangneter :roc</strong><span class=
Jun 3, 2004
640
2
18
Stockton 209
ok i got my motor started and was checkin everything out and i see puffs of smoke comming of the back of the heads.. i remember there use to be a tube there.. but now its not there! i dont remember where i placed it either:bang: :bang: so what can i do?? can i put some screws or something in there? or do i gotta go find another one at a pick n pull or something?
 
Ford has Screw in Plugs meant to replace that tube, they are like $5 at the dealer. But with the engine back in the car, it may not be so easy to get them in now.