Paul
On the '65 & '66 at least, the door pull link rod and the outside door button go thru a different linkage arrangement at the latch before eventually winding up at the same place. Wear at the latch mechanism can cause the inside pull not to move the latch linkage far enough to unlatch the door. I had this problem with mine, had to build up the wear points on the latch to correct the problem. You may want to take a look at this before finishing up your project. Sorry I don't have any pictures of the linkage mechanism I'm referring to on the latch, but if you watch it while operating both the outside button and the inside pull you'll be able to see what I'm referring to.
By the way, made the switch to the Edelbrock from the Holley as you discussed previously (your info provided in a previous post was greatly appreciated, made the job much easier). I couldn't be happier, starts, runs, doesn't leak, smooth idle, great performance. Should have junked the Holley long before I did. And it was a new Holley, correct reproduction for my '66, too. Go figure!!
Hope this is some help!!
Ron