C30 vs K30 cab difference

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.

75Monza

Full Access Member
Joined
May 5, 2017
Posts
1,362
Reaction score
2,840
Location
Colville, Washington
First Name
Jeremy
Truck Year
1980, 1982, 1985
Truck Model
K30, K20, K20
Engine Size
454, 383, 350
Anyone know if I can take an '80 C30 4 speed cab and swap it to an '80 K30? I have a column for auto, just not sure how much difference in the trans tunnel. Looking at pictures, the C30 does have the removable tunnel like a K30. Found a rust free cab :)jawdrop:), trying to figure out if I can mod it to my K30 rust bucket.
 

Bextreme04

Full Access Member
Joined
May 13, 2019
Posts
4,201
Reaction score
5,108
Location
Oregon
First Name
Eric
Truck Year
1980
Truck Model
K25
Engine Size
350-4bbl
I think it will work no problem as long as you swap your K30 tunnel over... I've seen various posts on this subject and I think it is a bolt over swap between the two tunnels. I've never done it personally though, so YMMV
 

ajd89

Full Access Member
Joined
Nov 30, 2016
Posts
1,537
Reaction score
768
Location
Central Michigan
First Name
andrew
Truck Year
87
Truck Model
k10
Engine Size
350
Agree with above but depends on the year the later trucks aren't bolt in humps. Have to cut the old one out and swap. The 4 speed 2 wheel drive trucks got the taller tunnel if I remember what ive read correctly.
 

75Monza

Full Access Member
Joined
May 5, 2017
Posts
1,362
Reaction score
2,840
Location
Colville, Washington
First Name
Jeremy
Truck Year
1980, 1982, 1985
Truck Model
K30, K20, K20
Engine Size
454, 383, 350
Cab is 150 miles away...whole truck actually, that's why trying to figure out before I go the distance with a car trailer. It is a 1980 C30 dually, was 454, 4 speed. Mine is 1980 K30 350, automatic. Both are A/C cabs.
This is the C30.

You must be registered for see images attach
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
29,126
Reaction score
24,034
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
The difference is usually at the rear of the hump. The 4x4 version meets up to a bigger hump in the floor, under the seat. Nothing a little sheetmetal work can't fix.
 

78C10BigTen

Full Access Member
Joined
Apr 12, 2017
Posts
15,601
Reaction score
24,046
Location
pennsylvannia
First Name
Ted
Truck Year
1978
Truck Model
C10 BIG TEN
Engine Size
350
Cab is 150 miles away...whole truck actually, that's why trying to figure out before I go the distance with a car trailer. It is a 1980 C30 dually, was 454, 4 speed. Mine is 1980 K30 350, automatic. Both are A/C cabs.
This is the C30.

You must be registered for see images attach
Too bad your a country away! If you bought it id but the 454 and 4spd from you.
 

Honest Bob

Junior Member
Joined
Feb 23, 2020
Posts
9
Reaction score
9
Location
Easton PA
First Name
Ben
Truck Year
1975
Truck Model
K30
Engine Size
LS 4.8
I swapped my c30 cab onto a k30 chassis. My c30 floor was not removable but it was easy to cut it out with a jigsaw and a couple metal blades. Apparently I should have saved the hump behind the cover from the other cab. :uhoh2:

You must be registered for see images attach
You must be registered for see images attach
 

Forum statistics

Threads
42,174
Posts
910,700
Members
33,670
Latest member
ajiuo666
Top