I installed 38438 on my SC and had to drill out the hinges just slightly. Honestly, the new bushings can be tapped in sans drilling, but they are too tight and the pins aren't free to spin in them. BUT when I drilled the hinge to the size recommended on the package, the bushing was -I thought- too loose in the hole. I ended up going a 64th smaller and things seemed to work well.
One thing I can say: wish I hadn't waited so long to do that job. It wasn't fun but it could have been a lot worse and the doors close great now.
1994 Super Coupe ('93 5.0L swap), 1990 Tbird 3.8L, 1982 Honda CB900F, 1972 F-100 SportCustom 4x4, 1970 Chevy Custom Camper / 20