i have a set of the trickflow heads on my 383 and i put the temp sensor in the passenger side head, and i put a brass plug in the other hole on the drivers side head. but does anyone know if the hole in the front of the heads facing the front of the car r the same size. i have the lines on the back of the heads, but i don;t remember my old heads having plugs in them.

thankss alot,
greg

 

the old heads didnt. trickflow made them universal so you will have to block the extras off

 

The stock LT1 head has identical holes on both ends, since there is only one head, and it has to work on both sides of the engine.