Triumph Repair: Spitfire possible fuel starvation follow up, compression test results, vacuum gauge

Question
Howard, This is a follow up question after reinstalling cylinder head.
I have received the head back from the machine shop with the #2 exhaust valve repaired. Have reinstalled per your guidance, adhearing to tightening sequence and torque values. The engine starts but will not accelerate. When the throttle is applied the engine stalls like it is not getting enough gas.  I have done the following.
New manafold gasket was used no apparent leaks.
Drained fuel tank and filled with new premium gas.
Rechecked valve clearance and set to specs.
Played with timing with no results.
Verified fuel is reaching the carb and float valve is working.
Diafram and spring are in working order, piston moves freely.
Blew out all the orifaces I could find with compressed air.
Vacuum advance hose is connected at both ends.

If you recall the car ran prior to the head job. The carb was not removed from the intake manifold when I removed the head. I am at a loss. Any ideas ?
Pat

Answer
Hi Pat,

If you have installed the head and set the valve clearance to specs, you should set the timing to specs and not move it for any reason. Now since it had major surgery, you must run a compression test to confirm the head work. Don't skip this thinking "No use checking this because I just finished doing the head and valves". You can't leave any stones unturned when a engine is not running correctly.

AFTER the above is done. Take a can of starting fluid and spray it into the intake as you open the throttle to see if it is fuel starvation causing it to not rev up. Did you confirm that there was oil in the top pot of the carburetor. Have you checked fuel pressure (1.5 to 3 PSI)

Put a intake manifold vacuum gauge on the intake manifold and slowly raise the RPM and tell me what readings you get. Also what the compression test results on each cylinder were.

Howard