74 should be a DD38 with linkage. Check the date code on the carb to confirm is is from the correct era. I would be very surprised if the kit did not have the appropriate gaskets, the "tricky one" to make would be the one between the air horn and the body. I've got one that could be used as a template. On the early carbs, there really aren't many issues that you can run into. Review that thread I linked earlier for all the details. If you need a hand, let me know.
Ricardo Maestas - Bio Page
1999 LX 470, 1971 FJ-40