Hi from IL

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Strick

Full Access Member
Joined
Nov 25, 2020
Posts
1,340
Reaction score
3,274
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
 

idahovette

Full Access Member
Joined
Aug 7, 2016
Posts
7,236
Reaction score
15,788
Location
Weiser Idaho
First Name
Perry
Truck Year
1975-1979
Truck Model
K20-K10
Engine Size
350
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
Thanks for raining on my parade @Strick :flipthebird:......yes, I am OLD!!!
 

Strick

Full Access Member
Joined
Nov 25, 2020
Posts
1,340
Reaction score
3,274
Location
Dunn, NC
First Name
Harold
Truck Year
1979
Truck Model
C20 Crew
Engine Size
350
.....yes, I am OLD!!!
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
 

lscaspall

Junior Member
Joined
Nov 26, 2023
Posts
4
Reaction score
7
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.
 

Attachments

  • 75253187325__38F4A6FF-C803-486B-AF49-F5B2D10FF849.jpeg
    75253187325__38F4A6FF-C803-486B-AF49-F5B2D10FF849.jpeg
    120.5 KB · Views: 11
  • 75253185974__74340F30-66F1-40AF-97CF-89BEDFDEA492.jpeg
    75253185974__74340F30-66F1-40AF-97CF-89BEDFDEA492.jpeg
    139.1 KB · Views: 10

Sgt Gus

Full Access Member
Joined
Aug 2, 2023
Posts
254
Reaction score
382
Location
Texas
First Name
Mark
Truck Year
87
Truck Model
R20 3/4 ton
Engine Size
454ci/7.4L
Wow, sure admire you guys that do frame ups! Nice!
 

legend57

Supporting Member
Supporting Member
Joined
Jan 11, 2022
Posts
59
Reaction score
109
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.
 

Latest posts

Forum statistics

Threads
44,067
Posts
948,705
Members
36,134
Latest member
gtewolf79
Top