Fox T-Bird/Cougar Forums  

Ok after researching and calling a guy, I've found that the 5.4 will fit, it just needs some greasing.  The 5.4 van intake will fit under the stock hood of the 96-up mn12's along with the a machined cobra intake.  I guess the cobra intake width differences can be taken care of at the machine shop without altering it drastically.  The shock towers are the main problem.  Can't be massaged out too well, and it isn't something that can just be cut out.  Also, the lower K member has to be taken in to consideration for an exhaust.    Out of the 3 guys who have done it, most say it was well worth it, but very hard and more involved than it seems.  It would in all actually be easier to drop 351 in it, slap a blower on it, and strap in.  Another thing about the 5.4 swap is that the valve covers can't be taken off until the engine is pulled.