You shouls be able to get the E7TE heads for free.
Most go in the dumpster when high performance heads are fitted.
I sent two sets thataway.
Subject: RE: 260 heads
> If you have to, or want to, use production heads as a starting point for
> whatever you're doing then the consensus view is that the '88-'93
> Mustang heads have the best potential for porting and revalving work,
> even though the GT40 or GT40P iron heads flow better out of the box
> (mainly because of the increased valve size). The Mustang heads in
> question have the E7TE casting code.
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