You need to give details just what you have checked so we can give you solid advice. I hate to tell you to start pulling your engine apart for no reason. Bill
Ditto....Did you ever take a vacuum guage reading from the engine? (It's been asked multiple times with no answer.) That is troubleshooting 101 when a vaccum leak is suspected.
We need more info if we are to do anything more than just make educated guesses and have you change everything. The info on the sight glass on the present carb is good info; it at least rules out a severe restriction between the pump and carb.
Do you have any info on how far are you retarding the timing to make it idle?
Did you ever get the fuel pressure down from the 8 psi that you had before?
