Anyone know what years have the 6 port actuation?

 

My friend wants to make sure his has it, his is an 87 N/A. Thanks.

 

Hmm most people shreek at the 5th and 6th port actuators, but any non turbo from 86-91 should have them...

 

O ya? I know mine are controlled somehow by the exhaust, like when I get headers I will have to find another way to open them. I understand that the 89+ does not have this problem. What is a fix for this? Thanks.