I have a 272 with the original Ford 350 2 barrel Holley carby fitted. (Australian)
When I bought the car about March 2014, it had been sitting for quite a few years.
I fitted a new gasket kit, new PV and all the other bits you get in a non genuine kit, drove it home about 1500 miles.
It ran reasonably well but didn't have a lot of power- engine is a bit worn.
I have since pulled the carby apart again due to now having a bogging down issue at about half throttle.
PV is not blown.

The Power valve is a 65 and main jets are 50.
From what i have read so far, these may be lean jetting and too low a PV
Idle vacuum is about 18Hg and very similar at cruise....maybe 16Hg 
Should I have a 73 or 80 or 85 PV ??
And what jets ?? Or should I buy a selection and test?
Any info would be great, Thanks

Former '59 Star Model Mainline owner: Current '59 Star Model Mainline owner