Between Cheyd Duty and ##### Truck Parts, you should be able to find ALL the parts to complete the changeover. I've got a '78 Blazer with the inside hood release, and needed some parts.
##### has some of the parts, and Chevy Duty has the others. And the prices aren't all that bad.
If you give me an email, I can give you the other source for your required changeover..
Kevin