How And Why Move Emulsion Jets?

I run a 360 [email protected] cam, sealed hood scoop, return fuel system and 750DP Demon. I drive this car on 93 octane pump gas 50 miles to run at the track. The tune I run is 14.0 afr cruise and 12.3-4 wot 1/4 mile.
71/85 jetting
MAB .028 IAB .067 front .070 rear
IFR .032 bottom position T slot restrictor .082 front and rear
T slot .020 throttle blade opening front and rear. Bypass air at idle added thru adjustable PCV
3 hole demon metering block .026/plugged/.026
5" power 4 hole power valve .063 PVCR
.035 nozzles, blue cam #1 hole, 50cc pump front and rear
timing 28* initial, 34* total, 46* ported vacuum advance at cruise. MSD 6al analog modified OEM magnetic pickup distributor.

Get an AFR gauge and use it as a TOOL to map the fuel curve of your carb.
The 3 and 4 hole QFT/Proform blocks come with .028 emulsion holes. Check the size of each hole, the anodize coating is not always uniform.
On a 3 hole block use the top and bottom and plug the middle.
On a 4 hole block use #1&3 and plug 2&4
If you decide to go smaller than the .028 and use a brass 6/32 restrictor carefully drill the emulsion holes with a #53 .059 drill bit.

Most out of the box cars are rich so people don't burn a piston.
Once you have an AFR gauge installed you will see that a street car spends most of the time running on the idle and t slot circuit. Tune this circuit first, then move on to the front primary, then PVCR and secondary jetting for WOT.