Originally Posted by Rineholio
As long as we're talking carb spacers, how about this? Has anyone run a drop base aircleaner so they could keep a 3" or larger filter and still add a carb spacer? That's a lot of curve for the air to follow.
Yep, and it's not a problem if you use a correctly designed dropped base. I use a 4" filter with a 1" open spacer and a950 holley on a Super Victor and it fits under the stock hood of a '72 Nova.
The very best is the original GM/Chevrolet design for the L-88 Corvette. GM did a bunch of testing to insure no power was lost in this air cleaner. This base is available from several resto parts suppliers. There are also a few good ones made for the Circle Track market.
Many of the generic chrome drop base air cleaners are not as good however.