Pressure regulator?

TT5.9mag said
Another thing I noticed, in the instructions for the moroso unit it says a return line must be used as it regulates pressure after the carbs. What would be the return on the OPs log appears to be capped off.

Maybe. I thought that capped off end was just another hook up for fuel lines.

Of course I didn’t know Moroso made an adjustable log style return regulator either so there is that.