Car not running what is should, need help.

If it was me here is what I would do.......

1. Get a good set of headers
2. Open the exhaust up or go bigger. 2 1/4 is way to small to let that motor breath.
3. Dump the GER
4. Get a MSD 6AL

You say the heads arent ported, What has been done to them?

Here is what I have on my 68 360 Barracuda.

360 Stock bore
unported "J" heads w/2.02-1.65 valves
Edelbrock Performer RPM
750 Holly DP
292/509 MP cam
727 Trans (no mods)
3.91 gears
245/60x14 rear tires (Kelly Chargers)
205/70x14 Front tires (Kelly Chargers)
Open headers (Hooker)

My best on a sunny day cool air was 13.21et @ 101mph
I launch at 2500 rpm and shift at 5500 rpm.
This is a pieced together set up I did just so I could go racing, The bigger and faster stuff may come later.