Head tapping question

[mcb82gt]

I have a 84 turbo head (inline intake) redone and I noticed when I held up my square 4 hole, I need a extra hole. Is it safe to drill and tap this head in that spot. If so, anyone know the size offhand?

Mike

[mfpmax]

Yup perfectly safe. Don't know the size but if you have a spare bolt you can use it to find the size for the tap.

[Evil86lx]

Yep. Go ahead and tap it.

kyle

[mcb82gt]

I am eventually going to put a LA3 in there. It would be nice to use the 87-88 lower for the ACT bung. Is the shorter height in the lower piece or upper? I dont want to swith valve covers because I have mine all done up fancy like 8) 8)

Mike

[mfpmax]

Upper. Some say that the height difference doesn't actually interfere with a stock valve cover, but I have not checked this myself.

[Evil86lx]

Upper.

If you want to use the stock VC you need to find the upper from a 85.5-86 Tbird or cougar. Commonly refered to as the "butt crack" intake which is also found on the 85.5-86 SVO.

Like this one.

http://www.coloradostangs.com/gallery/data/500/60Lx_pics_051-med.jpg

Use the 87/88 lower with the ACT already in it and the 85.5/86 Tbird/Cougar upper to keep your stock VC.

kyle

[mcb82gt]

Ive got the "butt crack" upper already. I was under the impression the lower was different. Someone wanna sell me a nice 87-88 lower????

Mike

[93-331-29PSI]

What is the part number for the 87-88 lower intake? I think I have one in the garage.

[mfpmax]

Probably E7 something or other. Not sure if they used the same lower for Pre-87. I got a picture that "looks" like it says E5 though, but can't make it out clearly. Someone correct me.