uberstang1

I didnt do the head swap, i got a complete 98 cobra and dropped it in, there is a guy in the area that actually did a 4v head swap he said it was a nightmare, he had a custum intake manifold that was prefabbed, i usually see him at work once or twice a week ill have to ask him exactly

2000GT4.6

People try to steer others away from this because its a nightmare, its really expensive, and unless you get a killer deal on the parts its simply not cost effective.

Try finding a cobra motor to even get a donor from.. they are not exactly plentiful. I don't have too hard of a time seeing you having well over 2k in the swap all said and done, and there is ALOT of stuff you could do while keeping your 2v under the hood for 2k.

Unless you simply have too much money laying around, when you are already starting off with a PI motor it simply does not make since. If you do have to much money laying around though... why did you buy a GT?

As stated, all you really need is just an entire 4v assembly to rob parts off... so why would you only swap the top end? Modulars are not exactly the easiest motor to work with anyway, and the headers/manifolds already have to come off (and be replaced) so your 99.99 percent of the way to pulling the motor anyway.

AJ06GT

I wont have a donor motor, I'd be buying the parts, possibly rummaging them off junkyard cars if they are any good. That's why I want to know exactly what I'd need.

Yes, a fully built up 2v compares to a vanilla 4v. I'm eventually rebuilding just about everything in this car and making it into a project car, not just a fast daily drive or anything. The 4v would be great for the future plans, I just want to know what's involved.

I'm not trying to pick at anyone who's trying to help, but kecclest is right. I'm not asking how hard it is or if it's a good idea. Please only reply if you can actually give helpful information about specifics, what parts I'd need and about how much they'd all cost.

That's fine, and I thank you for your concern, but even if I'm going to do it or not, I'm interested in exactly what's needed. As for why I'd want to do it, why do people build cars like code did? He could easily put an SC on there or something but he wants to do his own thing. So far all I've gotten is "you need to replace a lot" and "it'll cost a lot" with a couple of guesses of $2000 or more. As I also stated, I don't have an entire 4v laying around so I need to know specifics. Even if I had the entire thing I wouldn't know exactly what I needed to swap unless someone can help me list the parts. I'm just asking someone to feed my curiosity you know? I'm not saying that I'm dead set on doing it, I just want to know about it.

2000GT4.6

http://cgi.ebay.com/ebaymotors/FORD-...spagenameZWD1V

There ya go.

If your talking about walking up to a ford dealer and just ordering new parts... wow your talking about a LOT of money. There are going to literally be hundreds of parts you will need, thousands upon thousands of dollars.

You really will need a donor car to get this done. You are going to need everything off the top of the engine (block up), and its going to require the 4v timing chain setup (front cover stuff). You will also need a retune for your computer (but you can use yours, although there is a good chance you will have to cut and splice wires to make a couple reach). The manifolds are also not compatible, and you will also need a new intake setup (inlet, throttle body)

I would really really consider taking the above guys advice and just finding an enitre junkyard 4v 4.6L motor. Much MUCH less PITA, will probably come with the correct mainfolds and throttle body. If you have never opened up a 2v motor I am not sure you understand you are not talking about a really easy job.

The only + side I can see is that you ARE starting with a NPI car. With a NPI car it KINDA makes since to do a 4v swap, since you really need to get rid of the stock NPI stuff any way you can. However, as stated its going to be pretty dammed expensive, and there are pretty cheap options out there compared to a 4v swap.

Quick Shot xMLx

If anything go buy/find a Mark VIII. They have the 4.6 4 valve and those cars are pretty damn cheap. Just throw the whole motor in your car. There's not much if any "custom work" to do with that route.

AJ06GT

Thanks, I guess I misread myself and asked opinions even though I thought I said I didn't care if people thought it was a good idea or not, I just wanted to know more about it. Sorry, that's a mean reply but I'm not in the best mood right now and you guys need to learn to read.

_UnLiMiTeD_

quick question what does pi mean, i here a lot of people talk about it.

Edit: Also you should really listen to what people on here are trying to tell you, basically 0 people can help you on this because basically nobody has done this. So ontop of this being a huge headache and a bad idea, if you get stuck which i garuntee you will when having to replace half the motor, you wont have anyone around to help you out. If you want a PITA project go buy a beretta and make it run 11's on the stock block, you be at that until you die, should keep you busy.

kcp1989

The collant passages will not line up with the 4 valve heads YOu might as well do the terminator swap for how much it will probably end up costing you. I know of a company that does only mustangheads and will probably have better results then the 4v if your interested.

AJ06GT

And, again, with th not reading, as I said, I'm not saying I'm necessarily doing this swap or not, but either way, I'd like to know why it's considered such a pain in the ***. Some of us actually want to learn things rather than continue to repeat what we hear without knowing what we're talking about.

Also, PI stands for Performance (some say Power) Improved. The 96-98 GTs had highly restrictive intakes and heads, and slightly smaller cams to match which lead to horrible flow. In 98 they ported the exhaust a little for a 10 HP improvement, but in 99 they did it right and ported everything properly, labeling it PI and going from 215 HP to 260 HP.

Hmm... I always thought they were all the same block. If coolant passages don't match up then yeah, it'd be a huge hassle and you'd certainly have to do a lot more than just replace the entire top end.

BraMas

Heads
Valve Covers
Upper and lower intake
Throttle body
cruise and accelerator cables
Front timming cover
new timming chain
coolant crossover tube in front of engine
thermostate housing (there located off the engine on the 4V
If you get a 96 to 98 heads they will come with IMRC's so you will need the ECM that way the computer will tell them to Open. You can get a delete kit if you can find one.
I'm sure there is more but that is what I came up with