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05-22-2005 06:51 AM #11
Ed yes it will be above the casting number around the generator area. The HP letters are around 1/2" tall. Mike is correct though about the Z code 390. This would not be a HP block if original. The 390HP, 406 and early 427 blocks have this HP identfier. It's also on the rear of the block and inside by the cam bearing and main bearing areas. G.
EDIT: Also the HP is cast in the lifter valley of the block.Last edited by FFR428; 05-22-2005 at 08:36 AM.





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A belated Happy 78th Birthday Roger Spears
Belated Happy Birthday