E and B -

Where are you getting the crate motor from?

If it's Ford racing, they discontinued the P heads awhile ago. It would have Y or X aluminums.

Either way, I would either stick with the E, or install the TFS Stage 1.

You can not really classify the cams as stages above stock when comparing the two. The E cam is an emissions legal cam and will give pretty good low end tq. Edelbrock copyed it for its roller Performer series. The B cam edelbrock copied for its Performer RPM line and has more durattion to give it a more lump to the idle. The B-Cam works AWESOME with a stock bottom end and 1.7 rockers. Dyno's have also shown a tq increase down low with TFS heads over the stage 1 cam of the same brand when using 1.7 rockers with comparable HP figures throughout the RPM band.

With P heads I would use the E cam - P's are not crazy about RPM's and either is the E cam - it usually makes a pretty potent combo for the street - very good HP and TQ with street RPM's (idle to 3800). I usually recommend the B cam for more agressive heads and cars that see some strip duty.

Some will tell you that both cams are dinosaurs and should not be used - usually the same people that say the GT-40 intakes are outdated. Maybe for 9 sec Real Street cars and stuff I would agree - but not for Street cars. Check out the recent dyno article in 5.0 Mustang Mag testing the BBK SSI for a good comparison.