The motor is a turd at low rpm, but that is most likely due to low compression and a 300 duration cam installed 5 degrees retarded. The motor starts pulling OK around 2500-3000 rpm but does have a surging/missing issue. That’s what I’m chasing.
300 degrees at what tappet lift. SAE at .001 valve-lift, 300 is nothing, that could be 268@ .008 tappet lift
But why in 'ells name is it in 5* retarded. I would fix that ASAP. and in a smogger compression ratio engine, I would advance the crap out of it.
Here's a secret;
I have run the Mopar ECU and a standard Mopar coil on full battery voltage, for several hours during testing. My world did not end and nothing blew up.
YOUR results may vary.