Yes I'm positive about the odometer. The driver seat is in way to good of condition and the pedals aren't worn enough for 185,000.

How will I know if the problem is internal like valves sticking or stuck piston rings? Inconsistent compression test?

Should I take the head off and clean out the ports and clean out and reset the valvetrain?


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