After 10 years it's time to replace the tires on my '69 Mach 1. I am currently running Federal 595 Super Steel (225 45 R 17 and 255 40 R 17) a brand sold primarily out west. I've never been happy with the ride always a vibration. They have been re-balance several times over the years the last time on Hunters new $20.000 Road Force machine and that's the best they have been but still have an annoying vibration at highway speeds.
Can anyone recommend a brand that is round and balances out well.
My problem isn't suspension I have global West coil over and TCP rack and pinion all new.

Thanks for the feed back it helped me make up my mind to spend the extra money. My car sits really low.

Go with 350's after 273's you will be satisfied. I have 370's with an AOD and 25540x17's and It's a little to much for the highway
 

Do you have a header brand you prefer I  have shorties on now don't know what brand they are on the car when I bought it.  I think the flange is warped this is the second gasket that blown out. I'm tired of taking it apart,
 

I have a 1969 Mustang with 351 Windsor. I want to replace a cracked header are there any tricks to making the install easier on the drivers side. Maybe a certain brand of headers

Take the starter out and push start the car
 

Nice work. For those of you that can't do that kind of work Concept One out of Georgia makes a kit that does the same thing with tensioner.  I put one on my 1969 Mach 351. I used electric power steering which really cleans things up. 

The bump steer gauge is for 1979 & up doesn't work on the vintage  Mustang.

Did the park lights and tail lights started the headlights need get the tool for that little spring.

Does anybody have any experience with LED headlights on a 69 Mustang?

1969 MUSTANG 351 MILD BUILD, MSD MECHANICAL DISTRIBUTOR, MSD #8222 HIGH VIBRATION COIL EPOXY FILLED, MSD 8.5 MIL WIRES ALL PARTS LIKE NEW.  TOOK THE CAR OUT TO GET FUEL AND ONCE IT WARMED UP IT HAD A MISS THAT GOT WORSE. OPENED THE HOOD AND FOUND THE COIL SPARKING FROM THE TOWER TO THE POSITIVE AND NEGATIVE POSTS ON THE COIL CAUSING THE MISFIRE. I CHANGED THE COIL AND WHEN IT WARMED UP IT DID THE SAME THING. ANYBODY HAD A SIMILAR EXPERIENCE?

According to Daze Car your better off modifying what you have or going with one of the coil over conversions. Daze says the Mustang 2 type suspension should be used only if you need the room for a larger engine. Daze say's it messes up the suspension geometry and handling.