Trying to learn as much about the L28 that I just bought as I possibly can. It is an L28 with an N54 casting code. It has an N47 head and the cam is an "E Marked". I was doing some reading and I can't tell if this is the normal cam that came in the N47 head or if this is more of a performance cam. It is my understanding that the engine was built by a guy who has rebuilt a number of these for racing. If anyone has some info as to whether this is the stock cam or what sort of performance I can expect from this setup let me know.

As always, thanks again! Just learning as much as I can about my engine configuration before I drop it into my 73 240.

You shouldn't trust the mark on the cam, especially if the guy you bought it from built racing engines. Even if the E mark matched what should be in it, it might have been reground. To know for sure easiest thing to do would be to measure the lift and compare to the stock spec. Easy enough to do with a dial indicator and some V blocks. Just measure, then multiply by 1.5 for at the valve lift #'s.