Yes I recently acquired p90a head with a new cam, I was wondering if i can pull the cam out and put it in my freshly rebuilt n47 head.

i think the cam's are the same from what ive seen on the net i think they are both .240 the cam in the e88 head is a little diffrent just do a cam search for details.

Cams and Rockers should to be worn in together. You don't want to combine a used cam with a different set of used rockers - the wear patterns will not match and you will get excessive wear. If you swap in a used cam - use the same rockers used with that cam, on the same lobs. Number them and don't mix them up. Otherwise you can have a set of used rockers resurfaced or buy new rockers {EXPENSIVE} to use with the used cam in a different head.

FWIW,

Carl B.