Shiftnoid makes a line of products for controlling throttle RPM at staging...
https://haconten.appieshost2.com/app...rs++++CATEGORY
Dedenbear also has their line (scroll down mid page):
http://www.dedenbear.com/thrtl_cat.htm
Just make sure you have a means to enrich the system at part throttle, or you'll be launching way lean.
Not sure about Autostart.
Since we run a Pro Mag 20, we're going with the MSD 8973 and a 2-step. So much easier than having all that air plumbing.