1957 3100, 235. Is there a diagram, schematic, laying out which hole, and even which grommet, is used for the cables, wiring and tubing running through the firewall? i.e. speedometer cable, oil pressure tube, vacuum tube for wipers, etc. Thanks in advance!
I have an electronic copy of the 1955-59 FAM. Below is fairly readable pic of Section 1, Sheet 39 that provides the Dash and Toe Board layout and routing/mounting diagram. Hope this is helpful.
EDIT: The lower left diagram applies to your 3100.
Last edited by Gdads51; 02/11/20244:36 PM. Reason: add info
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
It is well worth the investment. You might also consider a shop manual for the GM repair/maintenance procedures. Some of the instructions are 40-50 years out of date as best practices have changed, but it is a good place to start for questions.
