Gas Recirculation Valve (egr Valve) problems of the 2003 Ford Explorer Sport Trac

Engine & multiple parts in 2003 Ford are not 2003, they are 2001 & 2002. 2002 engine and earlier had a TSB for the timing chain guides & oiling. Even though taken into the dealership with that complaint, mine was supposed to be 2003, not affected by those problems, so service did not repair for TSB. Later on timing jumped because guides not replaced, bent valve and ruined the engine to tune of $5,000, plus parts spent to get to that point & rental cars. Should be noted the first replacement motor installed by Ford ran only 15 minutes before it blew from timing chain defect/poor manufacturing. History: before end of 75,000 mile extended warranty I took the sport trac into the dealer to take care of all the little complaints. One complaint was slight rattle type of sound when the car was cold/cold morning. Dealer suggested an engine flush & to switch to full synthetic oil. That did help for several thousand miles. Engine rattle came back, only very occasional but worse sound than before on real cold mornings. Was coasting toward red light, light changed & I gave it gas, engine started missing severely as I took off w/check engine light coming on. Limped the car home. Put code reader on & started replacing parts called for, mostly tune up, then egr components, etc. , new code thrown after every repair. Smog parts for 2003 did not fit, I had to take the parts back & exchange them for 2001. When engine was changed service rep told me engine in car was 2002, even had to replace thermostat housing because routing was different, angle incorrect, not 2003, I took pictures of block & #'s, not a 2003, it is 2002 (pictures show my engine, no dirt accumulation at all). Carb states I cannot install an engine older than the chassis into the car, most especially older smog components. Can Ford? can Ford sell a car as new, specific model year, but use leftover parts from previous years & still call it a new car? isn't this fraud? how can vehicle be repaired, tsbs followed, etc. ?.