[ST]

I know this subject of vacum versus mechanical secondaries has been talked about before but I could use a little input.
I have dual Holley1850's with vacum secondaries now and I did the test with the paper clip on the diaphragm shaft. One of the carbs secondaries did not open all the way and its been checked and double checked. I've had enough of this vacum stuff, its time for mechanical linkage.
My question to you guys is how would one convert it over from vacum to mechanical? Is there a kit or is there a simple fix and would I need to block off the vacum port or just disconnect the housing shaft?
Thanks!