You are right but i have checked the wacuum and its not leaking at all, the carburator i was trying to use was an Edelbrock 650. I was working on the car a little bit today to and re innstalled the original Holley and it started but then the problems started to appear. it suddenly didnt go on all the spark pluggs, only 6 of 8 of them, and after about 5 minutes on the road my Automatic stopped working, i checked the fluid level and its a little above Full. Now it wont Shift gears or what so ever. Anyway after i reinstalled the old holley and made it go on all the plugs the car suddenly ran wery smooth, but the carburator is old and it doesent pump fuel for itself so i seems that i need a new one.