Well it didn't fix everything but it fixed the spasms. I still have random misfirings to where I'm just driving along and one of the cylinders don't fire and it shakes the car a little and decelerates for a split second. I hope the new plugs will take care of that. I get them on friday so I'll let you know


69 Buick Special Deluxe. Intercooled Turbo Chevy 250 @ 15psi on a stock long block. It's kinda fast.