87 Samurai with 1.3 stock, stock, stock. Vacuum advance tests bad (cannot put vacuum on advance. Diaphram evidently broke as I can suck air through hose.) Can't seem to find the part. Is it a universal advance or do I have to buy a complete distributor? Tips on changing if I can switch out just the advance. First Sammi. Got a month ago. Testing through all the systems. Bad mileage (15 MPG). Rebuild carb (Running rich) and tested ignition. Found bad vacuum advance. Appreciate any help. Thanks.