I have a steel 68 barracuda fastback with this combo. 4.56 gears, 28-10.5 slicks, torqueflite with manual valve body, 3800 converter, 408 stroker with 10.5-1 compression (approx), Crane cam solid lifter flat tappet, 248-258 at .050, 540-560 lift, Edelbrock heads with 1000 bucks of porting, Edelbrock RPM air gap dual plane manifold with 800 holley double pumper. The car does 1.63, 60 ft times and the best it has ever run is 7.25 at 94.5 in the eighth mile. Usually it runs low 7.3's. I am thinking about changing to maybe an Edelbrock victor single plane intake. I know it reduces the low end and my 60ft isn't that great, but do you think it would help my over all et. Any other ideas?

What rpm do you stop pulling hard at ? and what rpm so you trap at?

Hmm, well cam duration seems too small. Definately would go to a single plane. How heavy is the car? What suspension work has been done? Whos convertor? What are your et goals?

I would start with more converter, then move to the cam.

what does the converter really flash too?

I go through the trap at 6000 and it is still pulling strong on the top end. The converter is a PCI and I think it flashes around 3800. The suspension is 90-10's and 6 cyl bars in front and Chassis Eng.80-20 shocks, super stock springs and a snubber in back. The car is all steel with one seat, so with my butt in it, it has to weigh 3300.
It runs well but shouldn't the set up be closer to high 6.90's or 7.0?