Early or late?

[Pete G.]

Verifying intake manifold casting and date codes for my '68 427 L68. Unfortunately, the date code is on the underneath. Casting # (3937795)from documentation indicates it was used on late 427/400s. Is March 14 (vin 413723) considered "late"? What is cutoff point between early and late? According to documentation, my block casting # (3916321) is considered "early", block date code is L87 (Dec 7 '67).

Thanks!

[William C.]

Re: Early or late?

Block casting date is not a marker for early/late for the assembled engine. A better reference would be the engine ID stamp indicating when the engine assembly was completed. Early and Late are generally an indication that a firm date is not known and are provided as a general guide, but the reference would still come from the engine assembly code on the front of the block.

[Pete G.]

Re: Early or late?

Thanks for reply Bill. Unfortunately, I did a poor job of explaining my delemma.

I'm curious of intake cast # 3937795 matches to my car assemble date of Mar 14 '68? Restoration documentation I'm using indicates intake cast # 3937795 is for late '68 427/400s. Want to be sure that my car assembly date is not considered too early to have this intake installed on it.

This would all be moot if I had not spaced out getting the date code off the bottom of the intake.....

[Jack C.]

Re: Early or late?

Pete, my January 22 built has intake 3919850. I've been told, mine is not early but closer to midrange which is VIN# 9643