4160 Modification

How hard is it to switch over from a secondary plate setup to a normal 4150 style metering block secondary on a 4160? What is needed? I want to get a bit more out of the carb when the secondaries open.

I have a 750 I am working on for racing/performance runs, but want to sort this one out as well.

quick fuel and holley both make kits to convert from metering plate to metering block.

the kit includes the metering block..longer screws and gaskets.

http://www.jegs.com/i/Quick+Fuel/793/34-66/10002/-1