had the 54 ready for exhaust . charged the air and things got weird. engine ran fine but will not carry a load. a/c would drop rpm 400 , electric fan would lug it down a little more.
stock 5.0 out of 84 crown vic. 567 comp ex cam set straight up . low millage car that ran fine .
i pulled it and swapped in another 5.0 roller i had but would like to figure this out.
i had 15 degrees timing in it . vac advance was working .

????????