Re: Holley BB carb question
Anders;
You are correct, the carb is dated the 1st week of March 1968.
The stampings on the metering blocks identify how they're calibrated and what carb(s) they're applicable to. To note, the 3130 should have a #4596 primary metering block where yours has one from an early 3310 (#5271) which is technically incorrect for your carb, but will likely run fine.
The #4519 secondary metering block is correct.
Regarding the ink stamps, I'm unable to answer that question as I've yet to find out for 100% certain myself. I've heard several explanations as to what the ink stamps mean, and that's why I don't ink stamp my restorations...until I know for certain what the appropriate stamps are, I'm not putting them on.
Sorry I couldn't be of more help.
Eric
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