Drastang

ok just making triple sure if my 8th digit in vin is x it's a Windsor 8 both crank right? I'm just un easy on it because my car is a 02 but has 19lb injectors and I was told non post 01 had them..

school boy

On my investigating, the "x" just indicates that its a SOHC 4.6 GT model.
An easy way to identify if its a Windsor is to count the valve cover bolts.
The romeo heads had 11 bolts per valve cover while the Windsor had 13/14 bolts.

cominus

Is there a big difference between the blocks?

WJL

Not really, in fact you can use Romeo Heads on a Windsor block and vise versa. There are differences in the cams press gear vs bolted cam gear.

This topic has been discussed quite a bit, if you google PI swap there is more information there than you will ever need.

school boy

Nothng to note.
The front covers are different but interchangeable. The bolt sizes on one are a size bigger.
the cranks are the same except the Windsor has 8 bolts for the flywheel while the romeo has 6 bolts.
the heads are interchangeable. But the valve covers have different bolt patterns. the cam caps are different. The Windsor has press on cam gears while the romeo has bolt on.
Those are the main differences.

Drastang

I was actually asking because the MMR kit is a 8 bolt crank and I need to know for the flywheel

Drastang

and I read it's Cam cover not valve cover right or are people just calling it 2 different things?this is a 02 gt/460 so just trying to find out if I need new flywheel with the MMR set up

Z28KLR

People casually call them valve covers, but due to being an OHC engine then technically it would be "cam cover". Tomato-tomotto...

So assuming you have a Romeo engine (as identified by the number of cam cover bolts noted above) means you currently have a 6 bolt crank; if the MMR kit uses an 8 bolt then yes you would need a different flywheel for that (11", you can use anything advertised as fitting an 03+ Mach or Cobra).

97mustang17

02 was all romeo engines so yes you will need a new flywheel. half way thru the 01 model yr was when they switched from windsor to romeo so 99 to eraly 01 windsor late 01 to 04 romeo