adjust timing on TBI with adjustable FPR?

[redchevy914x4]

I have a 91 K1500 that is in my sig. It has the TBI 350. I just got the Jet adjustable fuel pressure regulator and fuel pressure port along with a guage for free. I am going to install the pressure port first to find out where my fuel pressure currently is, (although the gauge reads 0-100 so I will kinda have to make an educated guess) then install the adjustable FPR. Right now I have my timing set at 5 degrees advanced. Do I need to adjust it to zero when I install my adjustable fuel pressure regulator then and adjust my fuel pressure to around 14.5 or can I leave the timing where it is and just adjust the fuel pressure? Not sure if this has been discussed but I searched for a while and could not find anything. Thanks guys.

[ryan_thompson87]

Just leave the timing.

[redchevy914x4]

Thanks, thats what I was thinking, I just couldn't remember if i read somewhere that I need to set the timing at 0 before adjusting the fuel pressure.

[94x4 blazer]

great question. im about to do the same and any bit of info helps...