While tuning my 308, I'm almost sure the I've installed the distributor on the 1-4 bank 180' off. The car is running rough. I understand the distributors are to be installed with the flywheel at 7' (1-4) and 7' (5-8) and rotor caps pointing at the index marks on the distributors, making sure that #1 and #5 pistons are at TDC of their compression strokes. But how do I find TDC/compression stroke? Is this like trying to find the G spot (which I never could find)? One method I know is to rotate the engine CW while at the same time your finger is plugging the #1 spark plug hole - when you feel a little puff of air, you are nearing TDC/compression then finish by cranking to the 7' mark on the flywheel. But the spark plug hole is recessed and no part of my body is long enough to reach it. I tried everything. And that's on the #1 cylinder. On #5, you have to be two places at the same time: at the front, cranking the engine and, at the rear, testing for #5 compression. Geez, I think I just answered my own question: take an old spark plug, drill a whole down the center, install it, and attach a rubber hose to the top. There must be an easier way.