Defender Exhaust question

Hi all quick question i would like to fit a straight through exhaust to my 1995 Defender 90 300tdi,
It does not have a cat as far as i know lol, but just wondered if i could replace the mid and back section with these.

PM951 | SS Silencer Replacement Pipe - Def 90 300TDI to TA999221
ESR4527 | Rear Tailpipe - 90 300TDI from TA999222 to WA159806

I could not find a stainless steel back section and i don't want to be fitting a behind door side exhaust just yet.

Had mine from a place in Stourbridge. They supply and fit while you wait. Advertised on fleabay. Had a full 3" system with one cherry bomb centre box £200 all in and fitted all in stainless with a choice of tail pipes and where you want them to exit. Sounds great and performance notably improved

Yes it might come to putting a full stainless system on, but wanted a cheap straight though system for know,

So does anybody know if i can fit these part to my fender with out heavy modification.

???

Is it safe to run the TDI with a straight through exhaust?