Hi from IL

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Strick

Strick

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Location
Dunn, NC
First Name
Harold
Truck Year
1979
Truck Model
C20 Crew
Engine Size
350
I've got one of those NP203/TH400 setup somewhere out in the weeds. I love those dual crossmembers with skidplate. I'm building a '78 K20 GMC with almost the same setup as you with the exception of mine being SM465/NP205. Keep your pics coming and let us know the "what-for" on the hole alignments when you find out.

HS
 
I

idahovette

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Location
Weiser Idaho
First Name
Perry
Truck Year
1975-1979
Truck Model
K20-K10
Engine Size
350
Strick said:
I was going to mention that I've seen 20's with TH350 trannies which are shorter than the TH400. @Idaho, you bought your K20 when I was only a few months old!!! Wow.

HS
Click to expand...
Thanks for raining on my parade @Strick :flipthebird:......yes, I am OLD!!!
 
Strick

Strick

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Harold
Truck Year
1979
Truck Model
C20 Crew
Engine Size
350
idahovette said:
.....yes, I am OLD!!!
Click to expand...
Wow, replied with sign language too!!! My dear ole dad bought his (mine) crew C20 when I was 5 years old. He told me several times while growing up that "there was a time when I was thousands of times older than you, but you're catching up". When I finally was smart enough to realize what he was saying it was a great "AHA" moment. Now, I tell my kids and Grands that same thing he told me years back. Enjoy the birthdays @idahovette, I'm certain there is much experience that comes with those annual reminders.

HS
 
L

lscaspall

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Location
Chicago
First Name
Scott
Truck Year
1974
Truck Model
K20
Engine Size
350
We decided to move the cross members. Thank you all for the welcome notes and feedback! It’s still a mystery as to why the mounting positions didn’t line up.
 

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Sgt Gus

Sgt Gus

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Location
Texas
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Mark
Truck Year
87
Truck Model
R20 3/4 ton
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454ci/7.4L
Wow, sure admire you guys that do frame ups! Nice!
 
legend57

legend57

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Location
San Jose, CA
First Name
Rob
Truck Year
1976
Truck Model
K20
Engine Size
400
Since it is a fairly small amount, it is possible the front motor mount brackets were moved. They are slotted and have fore/aft adjustment.
 
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