On my Altered I run a Bird Catcher on my 434ci. sbc and it runs great! I would never go with gas because it runs so good,the trottle responce is perfect and you gain about 8 or 9% more power just by running it :wink: Ya there are some draw backs like changing the oil more often and having to drain the system at the end of the race weekend,and I've heard some guys have a hard time starting their cars but I run a primer on mine and I have no issues.