thanks for any help my 1950 f3 with a flat head v8 sound like its running on 7cyl. I have put new wires dist.cap new plugs still no change, hope someone can give me some tips on what to try next thanks

 

If you've done all the tune-up stuff with no change, it's time for a compression check. You may have a bad valve inside. Keep us posted on your findings.

 

thats what my son inlaw said too, whats would you have to do if that was the case this is my first flat , not like just pulling head off and take it to shop thanks for your help

 

It's pretty easy to pull the intake manifold and watch to see if the valves are following the lifter up and down. Compression check is still a good idea to eliminate a burned valve as the trouble.

One other thing to consider - I don't know what quality wires you put on it, but that can make a difference. Also keep in mind that plugs 1/2 and 6/8 fire in sequence to each other. Cheap wires bundled close together can cause some cross-firing at the wrong time.