Ah I misread, Jimmie Price is running the 264 cam. Sorry about that. Still the 390 Holley front 2 barrels are very close to the stock 292 carb. From my LIMITED understanding of Holleys they do best when opened up enough in normal driving to "work" the main metering systems at part throttle. A 292 should need enough airflow to do that and provide decent mileage. My only experence with a Holley is the 2bbl on my boat. As the throttle is about half open at normal cruise speeds the carb is just fine. Jay 6155
