Hi Jukka-
If you haven't verified 6-7 psig fuel pressure or verified the fuel line from the tank is adaquately delivering fuel, do that first. REGARDLESS of what components you're using, verify the fuel is getting to the intake both in volume and in pressure. You should also have some (gauged) means to ascertain fuel pressure at top end/going through the lights. Next, verify fuel level is correct in the carb bowels, then check and read your plugs for proper jetting, make sure she's not banging from being lean on the jetting, you won't like dropping a hole in a piston! Hope all else is going well for you and drop me an email when you feel up to it...wb

BTW, junk the Mopar ECU-ballast resistor and install some form of GOOD box, Mallory/MSD/Crane/Jacobs, something that won't leave you hanging.