what is the compression on a 351w supposed to be? psi not ratio.. I just put this motor back together and dropped it in. and now it sounds like there is no compression it is just turning over without firing at all.
I would say for a fresh motor look for around 175 PSI, remember to hold the throttle body open while cranking the engine. A worn out engine is down to like 130 PSI or so, all variable depending on the CR of what you are running.