the dump valve is blanked off with a plate?

or does it still catch the valve on the top and require a section cut out and rewelded ?

 

No.
This is quite a big job. (Bigger than fitting an FMIC)
The BOV is not a big problem and no problem at all if you are doing away with it as I have done in the past. You could also use a flange adaptor to mount the BOV remotely. I have one here if you go that way.
You have to make brackets for the installation and resite the ICVS. The TMIC is a tight fit but a little bit easier if you tilt it up at the back. Also you need the undertray to match the TMIC you use. Unless you use a bigger scoop the results are not as good as they should be if you are running more power than standard.
What do you plan to run from your 2.5?
Drop me an e-mail if you want photos.

 

i have seen the various threads on fitting them, i just could not remember if they caught the valve because people were trying to use the "bolt on flange style" BOV`s

the 2.5 is going to run 350/350 so a front mount is not what i am looking for, been running 300/300 on the stock top mount for years

will consider some more options

 

sti8 tmic not a worthwhile mod imo