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Old 04-03-2015, 01:05 PM   #1
robgmaddux
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The Mad 72 k20
I have been reading this forum for years. Lots of great info on this site. Finally decided to start my build thread. So here we go. I bought this 72 k20 from a friend. My friend owned it for several years he decided to take it all apart and have the engine rebuild and the truck painted. Well the guy that was supposed to paint it painted about 1/4 of it and skipped town. The truck sat for about 8 or 9 years. I tried my hardest to get the truck. Finally 1 and 1/2 years ago he sold it to me.
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Old 04-03-2015, 01:09 PM   #2
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Re: The Mad 72 k20
Would love to add some photos can anyone help me understand how to.
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Old 04-03-2015, 01:44 PM   #3
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Re: The Mad 72 k20
If you upload them to photobucket it will be easier to copy/paste them

If they are online already, just click the tan box at the bottom of this page with the little mountain on it, and insert the URL/Web address there!
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Old 04-03-2015, 01:46 PM   #4
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Re: The Mad 72 k20
This is what it looked like when I first brought it home.
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Old 04-03-2015, 01:48 PM   #5
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Re: The Mad 72 k20
Nice color!
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Old 04-03-2015, 01:52 PM   #6
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Re: The Mad 72 k20
Well I pulled it the rest of the way apart. The paint was peeling off in quite a few spots. I pulled the 402 big block sold it. I had a 5.3 out of a 2000 silverado that I was going to use In a jeep project. (had to sell jeep to pay for this project )
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Old 04-03-2015, 01:57 PM   #7
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Re: The Mad 72 k20
This is my 5.3 when I brought it home.
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Old 04-03-2015, 02:00 PM   #8
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Re: The Mad 72 k20
Sandblasted cab
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Old 04-03-2015, 02:03 PM   #9
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Re: The Mad 72 k20
Sandblasted cab
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Old 04-03-2015, 07:59 PM   #10
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Re: The Mad 72 k20
Nice start
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Old 04-06-2015, 10:52 PM   #11
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Re: The Mad 72 k20
I pulled the 5.3 apart looked looked really good. No cylinder ridge took crank to the machine shop it was perfect just a polish. I replaced the rings and bearings cam bearings. I also got a takeout 2000 ls1 camshaft off of eBay. Also replaced oil pump lifters and timing chain.
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Old 04-06-2015, 10:54 PM   #12
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Re: The Mad 72 k20
The motor going together
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Old 04-06-2015, 11:21 PM   #13
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Re: The Mad 72 k20
Motor
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Old 04-06-2015, 11:31 PM   #14
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Re: The Mad 72 k20
decided to redo my own harness what a pain in the butt.
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Old 04-06-2015, 11:37 PM   #15
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Re: The Mad 72 k20
Howdy neighbor! I'm on board for your build - been through one 72 K20 myself. Best, Pete
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Old 04-06-2015, 11:52 PM   #16
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Re: The Mad 72 k20
Quote:
Originally Posted by DeadheadNM View Post
Howdy neighbor! I'm on board for your build - been through one 72 K20 myself. Best, Pete
your thread is great I read the whole thing a couple of times. What part of MT?
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Old 04-06-2015, 11:38 PM   #17
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Re: The Mad 72 k20
Time for a little paint. Just inside the cab and firewall inside of doors.
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Old 04-06-2015, 11:41 PM   #18
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Re: The Mad 72 k20
Few more paint pictures
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Old 04-06-2015, 11:44 PM   #19
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Re: The Mad 72 k20
I modified my stock crossmember to make it fit with the deep oil pan. I also got some fbody ls exuast manifolds off of eBay.
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Old 07-08-2015, 02:48 PM   #20
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Re: The Mad 72 k20
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Originally Posted by robgmaddux View Post
I modified my stock crossmember to make it fit with the deep oil pan. I also got some fbody ls exuast manifolds off of eBay.
could you by chance post a few pics of how those 98 manifolds fit and what you used for mounts/crossmember clearancing?
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Old 07-09-2015, 09:00 PM   #21
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Re: The Mad 72 k20
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Originally Posted by rickcdewitt View Post
could you by chance post a few pics of how those 98 manifolds fit and what you used for mounts/crossmember clearancing?
Here are those pics. Let me know if you need anything else.
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Old 07-09-2015, 09:17 PM   #22
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Re: The Mad 72 k20
Got door panels on. Box has apoxy primer.
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Old 04-06-2015, 11:48 PM   #23
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Re: The Mad 72 k20
Pictures of cab going on and cab on motor is a little tight but I didn't want to mess with drive lines.
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Old 04-06-2015, 11:59 PM   #24
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Re: The Mad 72 k20
Thanks! I'm just down the street in Kalispell. Happy to help with parts or whatever else I can.
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Old 04-07-2015, 12:03 AM   #25
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Re: The Mad 72 k20
That's awesome I work in kalispell.
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