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I am looking for some info on a set of heads I have. I am rebuilding a 1968 383 and the heads that I got with them have a 250 casting number. I have done some googling and searched through old forums on here and all I know for sure is that they are 1968 383 only as the other big blocks got the...

I plan on getting a 509 purple cam and am wondering if anyone knows the difference between part number P5007698AE and P5007698. As far as I can tell they are exactly the same but the latter is significantly less expensive. If anyone knows the difference I'd appreciate any info before I buy...