I NEED TO KNOW THE FEELER GAUGE SETTINGS FOR POINTS ON A 1972 400 BIG BLOCK AS I AM USING STOCK DISTRIBUTOR.THANKS GUYS

If my memory serves me correctly .017/.021

is there anywhere to confirm this online or were to look to confirm these specs..thanks

If it's the original distributor, it'll have some shaft/bushing wear. I'd set them at .015" to help tame down the dwell.

Since there was no point ignition in 74,you would have to use earlier spec's,.016 to .021.

thanks . to you all..joe

In always used .016. when you have it on the lobe move shaft back and forth to see how much play is in the top bushing often see them open to .040 and close completely the other way.

As the rubbing block wears on the points the gap gets smaller, so a slight drag at the .017 setting is usually good.
Be sure to wipe clean the feeler guage before using it, so you do not wipe oil or contaminats on the contacts of the points., and add a very small dab of dilectric grease on the bubbing block..

The factory spec is just an arbitrary setting for a certain interval b 4 servicing is needed. You can actually set em wherever you want & for high performance even as low as .010". Smaller gap =longer dwell time (hotter spark from more saturation time)=shorter life (more closed time for them to burn) =less likely to bounce at higher rpms (not off the anvil as high so less bounce. All the above is inversely proportional. For the longest life go at least the factory gap even a bit more. EDIT as said check the side to side play as the spring tension at the rubbing block wears the bushings far more than an electronic one esp if hi perf (more spring tension) points have been used extensively in it. Might get a rebuilt advance auto point dist (supposedly cheap) like the Pertronix conversion guys are doing

0.018 works for all engines every time, not saying there isn't another hundredth to be squeezed out with a different setting. But if you're in the desert a matchbook cover will get the job done too. Double up the matchbook cover for plug gap.

This thanks to dear departed Granville King. Anyone remember reading him in the 70s?

R.