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#1
July 14th, 2019, 10:57 PM
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401M Overhaul Done
Finally got my 401M overhaul finished. Put on a couple hundred miles and all seems well.Ended up .030 bored,New pistons and rings,rod,main,and cam bearings.Ballanced the rotating assembly. 650 AVS2 Edelbrock carb and MSD ignition,keeping the points. 21/2 in exhaust with Jones turbine mufflers. I hope the tranny is going to hold. All I can say is WOW what a difference from the 305. It's got some burrs now.
 Dave
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#2
July 15th, 2019, 12:17 AM
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Re: 401M Overhaul Done
Congratulations! Post some photos and even a video too
__________________
1961 GMC Suburban 305A Overdrive 1962 GMC Utility 305D
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#3
July 15th, 2019, 02:30 PM
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Re: 401M Overhaul Done
Sounds great that you are on the road again! Just wondering if you reground the cam to the specs you got from Big Block? When I rebuilt my 351M I had a new cam reground to the specs. Seems that the cam kicks in around 2500 rpm - never have had engine reach 3000 rpm so only have used a small power band. You don;t live to far from me - we probably have seen each other! good luck with your build.
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#4
July 16th, 2019, 06:17 AM
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Re: 401M Overhaul Done
Hope to hear a video at some point.
__________________
"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
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#5
July 18th, 2019, 03:46 AM
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Re: 401M Overhaul Done
Quote:
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