[Thomas]

It finally stopped raining long enough for me to take my '69 Camaro for a drive on Saturday.
I had installed a new Flowmaster exhaust a few weeks ago and had yet to hear what it sounded like on the hiway and to feel whether it improved my performance.

I came across a problem the first time I "got on it". It appears the carb is starved for fuel.

It pulls all the way through first gear, but part way through second it looses power and has even backfired through the carb.
Once I get off the gas, the car just performs flawlessly.

If I drive the car "normally" it has no drivability issues and shows no other symptoms.
It starts every time and idles flawlessly.

The car has been in heated storage from late 2006 until late May of this year.
I did start it on a regular basis every month or so when it was in storage.

I have had the car on 3 long drives since June with no other issues.

The fuel pump was replaced in 2000 with an AC Delco unit and I have only put 5000 miles on the car since then.

I have not yet checked the float levels and will probably do that tonight, but I am thinking not enough volume through the pump.

The engine is basically a stock L72 (427 block with all the other pieces from the original L78) with headers.

Am I on the right track?