In-cab hood releases would be a wonderful item and I think you would have a ton of these sell.
Some of the guys on the forum have made their own but a lot of people don't like to fab up parts and search junk yards. Here is a link to a topic of how they did it
http://www.67-72chevytrucks.com/vboa...t=hood+release
Edit:
Thought of another one.
A fuel filler kit for the blazer tank install.
http://67-72chevytrucks.com/vboard/s...ad.php?t=77104
Basically would need all the parts in the write up prefabbed for the install. No adapters, no welding, no guess work at all.
Hope the creators of both don't mind me asking a vendor to make them.