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MR DERBY CITY · 06-21-2016, 12:52 PM

To answer your question seriously, if the heads are to be , shall we say chemically enhanced....then you will be fine with either head or even an 896 casting.

06-21-2016, 12:52 PM	#4
MR DERBY CITY VIP Member Join Date: Feb 2014 Location: Derby City, USA Posts: 3,329 Likes: 859 Liked 6,623 Times in 1,291 Posts	Re: 520 heads To answer your question seriously, if the heads are to be , shall we say chemically enhanced....then you will be fine with either head or even an 896 casting.