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View Full Version : 401 M Startup

Quigley
February 12th, 2017, 02:26 AM
https://youtu.be/bIMWFID3Zyk Video of 401M that I purchased out of San Antonio, Tx. Pretty Happy!!:upyes:
kchampagne
February 12th, 2017, 02:42 AM
Very nice!!!
bigblockv6
February 12th, 2017, 07:21 PM
The 401M looks to be a 72 model year judging by the valve covers, yet it has the breather/filter in the back like pre 68 engines. Most likely it is a 72 built 401M that was a replacement engine for an earlier truck.:thumbsup:
BillT
February 12th, 2017, 11:30 PM
Sounds good.
Funky61
February 13th, 2017, 12:13 AM
Congratulations! Sounds very Throaty and Muscular. :welldone:
TJ's GMC
February 13th, 2017, 03:25 AM
Runs like a top! :goodjob: