[Bill Edgeworth]

X2 what Ed said.
I think especially on stockers with factory intakes some have particularly bad fuel distribution. I know on my Pontiac stuff the distribution is not too good and to take a reading on any particular tube may be a bit of a gamble. Better to get an average in the collector. However if you do not have collector extensions it can be difficult to get an accurate number. I started out using an LM-1 now I use the dual channel Daytona module tied to a Computech DataMaxx. It’s a great set up for the money. I also think it’s important to remember that different fuels can require markedly different A/F ratios. In my combo over a full point difference between C-11 and C-12. An O2 sensor/Data Recorder can make life easy. If used in conjunction with a program like Crew Chief Pro which can calculate your corrected sea level HP. If you see that your corrected HP is dropping off when your AFR has not changed its can be a good indication you have some engine issues.