Meakin

Hi Guys,
I've posted this on Zcar.com and HybridZ as well, thought I would post it here to...Looking for as many opinions/info regarding the E30, as possible really. I hope you don't mind..

Due to my lack of knowledge (as usual) I need a bit of help: I have 2 engines (stock l24's) that I intended to take apart and then build up one of them to go in my 240z, until I'm ready to start modifying the car later. Or at least I think they are both stock ...Both blocks have P30 stamped on them so I guess they are stock. My problem is the heads. One of the heads is an E88 (stamped on it),the one with large valves, the other has E30 stamped on it and has considerably smaller valves?....both engines have had about the same amount of usage, so rebuilding the engine that is least worn, isn't a factor.Can anybody point me in the right direction?.....please? I have heard of the E88 and the E31 heads but never heard of the E30 head?..anybody know of the E30 head? and what head would you guys choose to rebuild?
TIA

Meakin