WHAT TYPE OF FUEL PRESSURE SHOULD I RUN FOR A 350 READ SIGNATURE FOR SPECS. TIMING IS ADVANCED TO 8degrees

Why Don't you start adjusting your's and find out what works best ?

i wanted an idea about where to start cuz i can't think of what my stock fuel pressure was on the 305. Anyone know what their fuel pressure is on 350 tpi?

Try starting around 38#

ok thanks i guess i'll have to go by SOP performance and the BLM and a/f ratio

Well you can do it like the old timers in my shop, and use your nose. Which may work well with Model-T's, but not so well in FI applications.

Or you can measure the voltage on the o2 sensor, or buy one of them gauges.

38lbs is a good starting point.

-- Joe

If you are using the stock 305 chip your fuel pressure is about 47/48 psi. As a starting point 41/44 psi for the 350 even with
the 24# injectors. Your A/F ratio is probably too rich right now.
My opinion.

yeah it is running rich at the moment . I was expecting the motor to run poor or set crazy codes with the 305 ecm but it's not. I'm goin to switch in the 350 ecm saturday to see if it makes any difference. Runs strong i finally c the difference between the motors 305/350 it feels like a completely different car and i'm loving ever minute expect the fact that the heater core is leaking now i got to replace that.

has anyone every done one if so any suggestion?
and thanks for the info