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Piston question

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Rivercrest View Drop Down
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    Posted: 17-February-2020 at 3:05PM
I am holding a piston in my hand out of my 1974 351C. Can someone help me to identify if this piston is a factory original ? Piston has 8-740 marking on it. Thanks for helping.....
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 72FordGTS Quote  Post ReplyReply Direct Link To This Post Posted: 18-February-2020 at 6:45AM
Start by measuring it, see if it's a stock size piston or a .030 over, etc.  I thought you said the block on your engine was already bored?  If that's the case, they are definitely not original pistons.
Vince

1972 Ford GTS Sportsroof - Survivor, One Family car

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rockatansky Quote  Post ReplyReply Direct Link To This Post Posted: 19-February-2020 at 11:56AM
at one time piston oversizes of .010", .020" etc through .060" were common shelf items,

.080" was even a thing early on. 8-730 doesn't ring any bells, get a caliper and measure the bore itself and the piston.
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