JC316

Not yet. Got it finished right as the season was getting wet and cold, so I haven't had a chance to run it.

AJB540

Does the Mark VIII has forged internals? Around how much HP could I build it up to?

JC316

Nope. They use the nodular iron crank and the same crappy pistons/rods as every other 4.6l 2v from those years. Stock, you can take it to 450ish rwhp, built, I have seen 1000HP monsters. The beauty of it is that the Mark VIII uses the Teksid block.

spruytte24

I am getting ready to do this swap into a 2001 gt with a 5sp. I have a 97 mark viii 4.6DOHC along with the pcm and wiring harness. Here are my questions.

Can I re-use my clutch? Spec stage 3 with 10k miles on it..don't wanna have to get another one. If I can't, what clutch do I need? Also what flywheel do I need? I have the tr3650 tranny.

Just to clearify that the stock gt computer and harness will work with the mark viii engine with a few modifications to the harness?

Thanks.

JC316

In 01, it should be the 6 bolt flywheel that's attached to your engine, so you can use the stock one, or any 6 bolt flywheel for an 01-04 mustang. You should be able to reuse the clutch as well, just so long as it attaches to the flywheel.

Yes, I am still running a GT computer and a GT tune with my engine.

liljojo4711

any updates on this? new track times or anything else i should know before starting the build? if i get a high mileage motor, what are some things i should replace in order to make it reliable? anything big difference between getting a 97-98 vs 93-96 engine?

basically all 96-98 cobra parts are what i would be looking for from now on correct? cams, heads, headers, intakes, pistons, rods and all that?

JC316

Still no track numbers, the weekend I was going to go, I sprung a water leak. The biggest difference in the 97+ motors is the intake, to save a headache, you really want the 97+ intake, or a cobra intake. The motor should be reliable. And yeah, all part will be for a Mark VIII or a cobra.

GTRACER88

Is this a sticky yet??? Awesome write up!

liljojo4711

so if im planning on a cobra intake anyway it doesnt matter. are there any differences between the 93-98 mark heads and the 96-98 cobra heads?

liljojo4711

double post