ID info from Tim Lederman's website and picture of the serial number location.

Also, check out http://flxibleowners.org/serial-numbers-6700-6800/
Attachments
261 ID 01.jpg (91.53 KB, 219 downloads)
261 ID 02.jpg (43.89 KB, 218 downloads)

Last edited by buoymaker; 06/24/2021 7:42 PM.
"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."