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Discussion Starter · #1 ·
Hey guys I don't mean for this question to sound stupid but can you tell what kind of piston you have by the castings on the top of the pistons?????

Thanks,
Dustin
 

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Discussion Starter · #3 ·
heres the castings,

425p .040
132-03-08-c

Let me know what you think

Thanks,
Dustin
 

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425P is a stock replacement cast piston. Not a performance part by any stretch.
 

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Discussion Starter · #5 ·
Thank you for the help guys,

Just wanted to make sure.

If my 4.04 bore will clean up without boring any further I will be purchasing new pistons. I don't want to go any further than .040 over.

Thanks,
Dustin
 

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You might want to hone the cylenders just to make sure there round, and use file fit rings to make sure you have a good seal
just my .o2
Tim
 

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Discussion Starter · #7 ·
Is there a difference between my pistons and the ones that came with the clevelands back when they were made. Are they any stronger? can they handle 6000rpms?
 

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Your factory replacement style 40 over pistons will handle all the rpms a stock set will handle, and speaking about a 351 cleveland I'd say you're safe to 6,500 with those pistons but not necessarily the rest of the pieces of the engine...
Although I did (daily) abuse a 74 Cougar xr7, 351C 4V up to and over 6,000 rpm's for several sumers in a row with never a problem but an empty gas tank...


FE
 
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