See build below....OK....now I have a Holley 80508 I think (3310 with bells and whistles). Everyone says that it is too small for my motor but I put it in with stock jets, set the idle, and it has worked great. The only thing I changed has been the secondary spring. Its seems that when I got on it, it bellowed gray smoke out the back. I had the silver spring installed. I then replaced it with the brown spring and the smoke went away. This it the second stiffest spring in the box...does this seem right that this would be the correct spring? I read in the specs that as the cubic inches go up that the opening rpm will come down but I think with the brown and black spring the secondaries never fully open. It would seem to me that if the carb is considered small in the first place that it would require a lighter spring?
