Also, an easy way to do a lockup converter, I used one off a 85 Chevette, they have a vacuum switch, and if you find one in the junk yard get the plug, very hard to find. Newer gm had a vacuum switch but Im not sure what years.and you need a 2 switch brake switch. One is normally closed for the lockup, one is normally open for the brake lights. Wire power into either then run to the other in, then out to the converter plug on the trans.