Mat, be careful de-smogging a 74-they run like crap if you just remove the smog pump-also the 74 is the only year that runs that pump and if you lose it you wont find another-i had to have mine rebuilt to keep my 74 running good and original-why de-smog? 74's are tough to get right-good luck-j
what year is your FJ40? You will never get a pass without all the equipment and most shops (like TLC) will not touch the engine once it's been classified as off road only-i would try to find the original parts on Ebay or wherever you can get them-good luck-J