The most common mention is either 11.263 or 11.406 but never associating them with the lifter style and/or year.
The 11.263 dimension shown at the OE Pushrods site is a compromise. The vintage Chevy Parts Master Catalog shows the original parts and dimensions. The OE pushrod is longer than the 3835777 original and shorter than the 3836260 original - yet claims to replace both.
Welcome to the repair part party . . .
I dug out my circa '06 Dana Clevite cross reference - it shows the same collapsing of parts onto a single replacement pushrod:
Dana Clevite - 215-4010 <----------
Cross-references:
Old Clevite - 21-3020
McQuay Norris - RP110
Manley - PR32
Sealed Power - RP1218 and RP3020
Wolhert 2206L among others . . .
This of course makes no sense because the Factory original lifter and pushrod packages all vary (as evidenced by the Chevrolet part numbers and dimensions).
But again consulting the Dana Clevite cross reference on the lifters and sure enough all three of the Chevrolet hydraulic lifters depicted above collapse onto a single Clevite replacement:
213-1630 <---------
Cross references:
Johnson Hylift - A-761
TRW - VL6 and VL46
Sealed Power 761 among others
This can make for a somewhat maddening assembly process when mixing NOS Chevrolet parts with after market replacements from differing eras during the obsoleting and collapsing of repair parts over time.
