I'll bet a case of beer that Carlos has a self-regulated electric pump up in the front.
I refuse to use regulators. I have a self-regulated rotary pump, it is always just under 3.5 lbs. Webers like 3 to 3.5. No more, no less. Solexes like 1.5 lbs. Period! No more than 2 for sure, the float valves get overwhelmed.
I bought a stack of 10 fuel pump gaskets, I ended up with 7 gaskets on my friend's sand rail with 2 35mm single throat PDSIT Solexes, and 1.6 psi.
I've seen 6 psi with a stock mechanical pump and one gasket under the phenolic spacer and one under the pump, FYI. I guess what I'm saying is YOU NEED TO MEASURE TO REALLY KNOW. Otherwise you're guessing.
FPcopo: I started with 60s, peak warm idle leaned to about 1 1/8 to 1 1/4 turns.
55s were too lean, it fell on it's face down low. 57.5 are close to perfect(mid sizes are available)
Carlos, your jets may be perfect, but you might just need a good synch and tune....