Ok, so my guy says that Holley batch makes these, however I am unsure the date codes were stamped as ordered. So, I feel that date codes were done as assembled.
I seem think that the GM part numbering is always rather off in comparison to date codes' more aligned font arrangements, so maybe the GM # is done as the air horn starts out then dated after assembly is completed---maybe not. The 4296 ink stamp could help identify it during assembly prior to satmping the air horn as well...
So, the L88 was well into the run and he states they were to have the 4296 throughout the run. I have not seen earlier dated ones so that for me is still something I'd like to see.
So, is this carb originally an L88 or ZL1 intended use based upon this?
Thoughts...?