falcon67 so you are saying my idle mixture screws should only be set at 1/4 to 1/2 out on all four corners? btw i had a 67 falcon sport coupe a long time ago. i do have some header extensions that i made ball and socket style that could be leaking but they are only about 6" long, just enough to prevent burning the speedo cable neutral safety switch.

Any ideas  why my 445 would be popping out the headers?
It's running great other wise.
Timing is set at 34° total right now
750 double pumper is running  a little bigger jets than it came with 73 front 85 back
I opened the little screw at the bottom  for the secondaries a bit more
Vacuum advance has been eliminated on the ready to run distributor
It's running  awesome  starts and idles great just pops a bit when I let off.
Link of my car below
https://youtu.be/gYAUqyNlNpI

want to buy heads for my 445 currently running c6ae-u heads that bolt up to my fpa headers. i have a 280h comp cam and rpm intake the part #s are confusing and pictures are all the same on edelbrocks site. what power gains should i  expect? can i run the same stock rockers? what part # should i get!

That's just awesome!

awesome! I want daylight too. can i ask what gears, tire, speed and rpm at the trap? i was 12.87@ 102mph 5500rpm with 3.89 and 255/60/15 Mickey Thomson ET streets

Performance Summary:
      1/4 mile ET:    12.872           1/4 mile MPH:102.17
      1/8 mile ET:    8.151           1/8 mile MPH:83.90
      60 foot time:1.786
      Track: Ashcroft B.C. Canada
      Weather Conditions: 29c

Vehicle Use:street car with one trip to the track per year


Vehicle Specifications: stock gta "S" code

Model Year:1966

Model:Fairlane GTA

Style:2dht

Engine Details (link to post in Dyno Results board if available: 445 cid, stock 66gt heads c6ae u, comp cams 280h 230/230@.050 530 lift, 9.8 cr, performer rpm manifold, fpa headers, holley 750 dp

Transmission: c6 with transgo shift kit

Torque converter details (if automatic):3000 stall tcs converter

Clutch details (if manual):

Driveshaft stock weak link broken in half with damage to floor pan

U-joints:regular stock

Rear end type:stock

Differential type:mini spool

Gear Ratio: 3.89

Axles: moser 28 spline

Front tires:225/60 15

Front wheels:centerline

Rear tires: m/t et street 255/60 15

Rear wheels:centerline

Front suspension information: stock

Rear suspension information: stock

Ready-to-race vehicle weight, including driver:3596 lbs

Close to 2"

Same rpm every time might rule out running out of gas, checked ready to run distributor for a possible rev limit in there and didn't seem to make any  gains. the old springs had some shims on some but not all and worked better than this. i will have to learn how to measure these things as i go.