mark viii block in a 98 GT?

1LowGT · Jan 4, 2006

i have a lincoln mark 8 rotating assembly with heads and i want to bolt 2v heads on it and stuff it into my gt will it work? or what needs to be done?

mogs01gt · Jan 4, 2006

1LowGT said:
i have a lincoln mark 8 rotating assembly with heads and i want to bolt 2v heads on it and stuff it into my gt will it work? or what needs to be done?

you will have to have a water passage drilled out on the driver side of the Mark VIII block. Also, you can use your stock front timing chain cover but one hole will not line up. Put some RTV sealent in there. Other than that, everything will bolt on just fine.

Dragstr05 · Jan 4, 2006

If your going to swap the Mark VIII engine in, you might as well swap it in with the 4v heads on it, or get some other 4v heads for it. Dont see why you would go through the hassle of putting 2v heads on a 4v engine.

1LowGT · Jan 4, 2006

2v is fine for me just want it lighter without having to change everything and im building it all forged so i dont need any other expense.

tomustang · Jan 4, 2006

Dragstr05 said:
Dont see why you would go through the hassle of putting 2v heads on a 4v engine.

less weight up top

mogs01gt · Jan 4, 2006

Dragstr05 said:
If your going to swap the Mark VIII engine in, you might as well swap it in with the 4v heads on it, or get some other 4v heads for it. Dont see why you would go through the hassle of putting 2v heads on a 4v engine.

Because of less weight and ease of installation. Putting a 4v heads into a 2v head car/engine is one pain in the ass.

Josh-'96 GT · Jan 4, 2006

mogs01gt said:
Because of less weight and ease of installation. Putting a 4v heads into a 2v head car/engine is one pain in the ass.

I'm in the process of taking out the 2v engine entirely, and putting in the aluminum 4v engine. Seems pretty straight forward, but I'm sure there will be a few minor things I'll have to change. The 4v has soooo much potential...

Disturbed One · Jan 4, 2006

go to www.cobrapoweredgt.com or http://www.fastestmodulars.com/index.php? With a 96-98 GT all's you really need to do is extend a couple wire and get a good tune with your stock computer and your good to go. The coil packs will still work on the motor. Go look through some of the post under the 4v swap and see what people have to say, It'd be easier to slid the 4v in there then convert it to a 2v.

TGJ · Jan 4, 2006

Disturbed One said:
go to www.cobrapoweredgt.com or http://www.fastestmodulars.com/index.php? With a 96-98 GT all's you really need to do is extend a couple wire and get a good tune with your stock computer and your good to go. The coil packs will still work on the motor. Go look through some of the post under the 4v swap and see what people have to say, It'd be easier to slid the 4v in there then convert it to a 2v.

It is actually easier to convert it to a 2V than it is to swap a 4V in especially if you are doing a rebuild. All the extra work that needs to be done is the coolant passage on the driver's side of the block drilled out and to get a proper fit of the timing cover is to use a 94 - 95 4.6L TBird front cover or use RTV on your timing cover. That is it. There is no wires to extend, there is no IMRC's to turn on via tune, etc.

TGJ · Jan 4, 2006

The reason I know this is that I have a 5.0L Big-Bore 2V motor going into my TBird. The block used is a 96 Mark VIII block. Now having a TBird, I have researched swapping a complete Mark VIII motor into a TBird and it is a very difficult task. A TBird and Mark VIII have more in common than a mustang and Mark VIII do.

1LowGT · Jan 4, 2006

thats what im looking for im building a 2v with pi heads for my 98,i want to shove some turbo on it eventually

1LowGT · Jan 4, 2006

TGJ said:
The reason I know this is that I have a 5.0L Big-Bore 2V motor going into my TBird. The block used is a 96 Mark VIII block. Now having a TBird, I have researched swapping a complete Mark VIII motor into a TBird and it is a very difficult task. A TBird and Mark VIII have more in common than a mustang and Mark VIII do.

hows that?

TGJ · Jan 4, 2006

I am not understanding your question as I am seeing multiple answers for it. I will attempt to answer them

1) 5.0L BB is not in the car yet as I am still waiting on parts, ie headers.

2) The Mark VIII uses a very similar chassis to the TBird/Cougar, the FN-10( MARK ) uses a slightly modified MN-12 platform( TBird ). The Mustang Oil pans will not work in a Mark VIII or a TBird, but a TBird can upgrade to the Mark VIII Oil pan. Mustang Headers won't work in TBird or Mark. Kooks makes a header for a TBird/Mark that is the same dimensions except that the Mark's is for the 4V head and the TBird's is for the 2V head.

3) If you were to swap a Mark VIII motor into your car, you would need a bunch of 4V Cobra parts to make it work in your car on top of the wiring and other things.

Dragstr05 · Jan 4, 2006

mogs01gt said:
Because of less weight and ease of installation. Putting a 4v heads into a 2v head car/engine is one pain in the ass.

I understand he is saving weight, and a fairly decent amount too. I'm just thinking that for the flow capability of the 4v heads vs the 2v heads that it would be worth it to just swap the whole engine in as a whole, even if it is a PITA. Guess it really all depends on how much power you want to make. But, I suppose a turbo and forged bottom end gives a good idea of where this project is headed. Would just be alot easier to make the power you want with 4v heads than 2v heads.

1LowGT · Jan 4, 2006

yes sir i agree,but i have a block here and you know how it is when you think aluminum,you get all excited about how much weight your saving and then its all downhill from there,i got the engine for free,my buddy owns a yard and he said take it. i really dont want to do anything but put a nice 2v back in the car that really is a simple swap and can hold maybe twin turbo.

Dragstr05 · Jan 4, 2006

Yes it deffinately would be a more straightforward swap putting the 2v heads back on it. Just like I said, depends on how much power you want to make. If 600hp or so is plenty enough, then by all means stick with the 2v. But if you really want to go crazy, save yourself the hassle later, and start with a better foundation now. Your power output will (almost) ultimately be limited by the heads, as it is pretty easy to make power with a turbo on these cars.

mogs01gt · Jan 5, 2006

Josh-'96 GT said:
I'm in the process of taking out the 2v engine entirely, and putting in the aluminum 4v engine. Seems pretty straight forward, but I'm sure there will be a few minor things I'll have to change. The 4v has soooo much potential...

that is the easy way. Buying an entire 4v long block. Building a 2v engine into a 4v engine is the hard way. Its easier just to buy the whole engine.

mark viii block in a 98 GT?

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