Re: L:88 piston ID
It looks like the Std. bore TRW/GM 1969 L-88 piston was #3959105,to be used with the "New" #074 Al. head w/118.0 cc.
GM #3959106 was .001 oversized.
GM #3981891 was .005 oversized.
GM #3959107 was .030 oversized.
They list another one,which I think was specific to the 1968 Corvette L-88 which used the #842 Al. Head. w/106.8 cc.
They are:
GM #3909857 was Std. Bore.
GM #3909858 was .001 oversized.
GM #3909859 was .030 oversized.
GM #3909860 was .060 oversized.
Sometimes the last 4 digits are pressed in them.
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