Bottomout Posted July 8, 2013 Report Share Posted July 8, 2013 Need knock box for 87 Quote Link to comment Share on other sites More sharing options...
scott87star Posted July 8, 2013 Report Share Posted July 8, 2013 A four pin GM HEI ignition module does the same thing if you can't find a replacement. You don't have knock control any more however. Quote Link to comment Share on other sites More sharing options...
Speedy2222 Posted July 8, 2013 Report Share Posted July 8, 2013 i have one, but i am unsure if it is 100% good, thought it was causing an issue on mine so i put an 88/89 on it, issue was still there. $15? Quote Link to comment Share on other sites More sharing options...
Bottomout Posted July 9, 2013 Author Report Share Posted July 9, 2013 I ee by the member map you are in Noblesville. When can I pick it up I need this asap... Quote Link to comment Share on other sites More sharing options...
joey_crandall Posted July 9, 2013 Report Share Posted July 9, 2013 (edited) I got one 40 shipped Edited July 9, 2013 by joey_crandall Quote Link to comment Share on other sites More sharing options...
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