Spoke with the machinist yesterday. The block is all cleaned up already. As usual he is my mechanical conscience. He said the cylinders, once honed, would be around .005 larger than a std bore and: "Yeah you could slap it together with the original pistons and it would run OK but since its apart you might as well do it right..."
So we are ordering a set of hypereutectic cast pistons for the block (which are actually rather cheap) in .020 or .030 over. As you may recall, this version of the 460 has 10-1/2 to 1 compression instead of the '72 and newer, which are much lower for regular gas use. He found a set of the correct high compression pistons and we will go with that.
I was going over some of my grandfather's original paperwork from the car and got a good laugh when I read the engine specs and it said: "use gasoline of 99 octane rating minimum."
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09-29-2018, 04:54 PM
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