Is this possible? My engine sometimes gets a more-than-normal shake, at idle in gear, foot off the gas in forward or reverse. Some throttle and it smoothes out. After things get heated up it doesn't seem to happen. Two different engine builds, different carbs at various mixture settings, different ignition systems....everything's been changed in one way or another, not to try to eliminate the shake, but just upgrades for more power & efficiency. The 727 was rebuilt last year, it was happening before that too. So it donned on me....the only thing thing that has been a constant on my car, is that b&m holeshot 2400 converter. Not a huge deal, I live with it but I don't think it's normal. Maybe it's just a little too tight for 452 cubes with the 231°@.050 cam? I know a quality built converter would've been a better move but it's what I had. Thanks!
