need 6ea JE703 pistons (4.5" 8.75:1 out of the 500 efi's) not sure what the actual part# is but mine has JE703 stamped under the piston.

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might be able to help you. I'll check at my shop tomorrow. Bob

i have some std bore ones 4.470.used and cheep

i have 15 4.495 thought they were 4.502 but was wrong je pistons if they will work call me 405-640-1491 i think most are stamped that on bottom

Looks like I found a set. Thanks OSO

I have 6ea stock bore 502 JE700 also if anyone needs to complete their set.