Trying to sqeeze more out of my 340

I agree with these guys, the heads are the limiting factor, then eventually you're gonna want a stroker crank, bigger cam, bigger carb.

If you can video tape your tachometer during a run it would tell you if you're converter is really stalling at 5200 or not. Stock stroke 340's have to Rev. I really like 8" ATI converters, I drive them on the street and at the track they will 60 foot in the 1.3's. If you can bring your 60 down a tenth it can equal 2 tenths in the 1/4.