holley tech line tells me my dual 660 setup wont be enough for my 871/496 engine. they suggest 750s. now when i read the holley books they have a series of modifications they tell you needed to be done. holley will sell you special made blower carbs but when i talk to a few guys i run into at the local shows they tell me they just a running reguler old carbs. Then the guys at the speed shop just say replace the power valves and call it a day. i'm a little confused.

Cal this guy Gary Heddon at Magnum Superchargers
1-763-753-6671 ask him he will tell you what he uses.