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| GMC V6 and V12 Engines Engine repair and rebuilding |
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#1
March 23rd, 2018, 10:07 PM
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Old 401M Big truck-Pickup
I'm getting close to finishing up my 401M project. I ran the motor checked compression, oil pressure, no knocks, no smoke, also did a leak down test, checked bearings and everything was very good, so just did a clean-up, new gaskets, and used 305 donor motor for front cover, oil pan, spin on oil filter. New timing gears and chain and new valve springs and retainers, water pump, and all the ignition parts. MSD using the original point distributor, also modified intake for 650 Edelbrock. Can,t wait to fire it up! Now I have to decide what to do with it. Thanks BigBlock for your help along the way you know your stuff!!! Dave
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#2
March 24th, 2018, 01:26 AM
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Re: Old 401M Big truck-Pickup
Very Nice Quigley; Cant wait for the video!
__________________
1961 GMC Suburban 305A Overdrive 1962 GMC Utility 305D
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#3
March 24th, 2018, 01:39 AM
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Re: Old 401M Big truck-Pickup
MSD using the original point distributor, also modified intake for 650 Edelbrock. Can,t wait to fire it up! Now I have to decide what to do with it. Thanks BigBlock for your help along the way you know your stuff!!! Dave
[/QUOTE]Quigley, I hope that you blocked off the center idler gear shaft hole in the block with a freeze plug since you eliminated the 3 piece gear drive and went with the double roller timing chain and sprockets? Otherwise 
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#4
March 24th, 2018, 01:57 AM
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Re: Old 401M Big truck-Pickup
Yes sir I did it just like you said. Frost plug with a plate over it, same thing on the tach drive. Thanks, Dave
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#5
March 24th, 2018, 03:25 AM
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Re: Old 401M Big truck-Pickup
Good to hear that
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#6
March 24th, 2018, 06:06 AM
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Re: Old 401M Big truck-Pickup
I know EXACTLY what you can do with it.....you can send it to me via ups truck.
__________________
"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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