Get the smaller diameter dual diaphram one. Just get one for an 86-87 plain Jane Regal. If you need a brake peddle let me know.I will be putting together some more kits very soon, time has not been on my side lately, running a business... and business has been good as of late, and is eating up my time. All you folks have been good to me with the brake setups, and I wish I could accomodate everyone. But between work, and race season starting I have not had the time to put the kits together, I will have some very soon.