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Lord77

Junior Member
Joined
Mar 4, 2020
Posts
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Location
Modesto, CA
First Name
Andrew
Truck Year
1977
Truck Model
C20
Engine Size
292
Hey guys I’m Andrew new to the group I’ve got a 77 c20 she’s a pretty clean truck for what she is all original and in pretty straight shape it’s a 292 3 speed looking to build up a small block with a t400 behind it but considering doing the ls swap, any input??? Eventually I want to fully restore the truck but keep it simple and keep it a sleeper. Looking forward to see what all you guys have done!
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
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Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
Howdy from another Andrew!
 

Kim Burke

Full Access Member
Joined
Dec 9, 2017
Posts
647
Reaction score
835
Location
Northern IN
First Name
Kim
Truck Year
1979
Truck Model
C1500
Engine Size
454
Welcome from AZ/IN.

LS every time. IMHO.
Easy to find, reasonable, LS swap parts and electronics are readily available.
Same money or less depending upon your application.
Oil consumption, gas mileage, and power advantages over old school 350/383 motors.
Resale value is no comparison to LS converts if done well.

Overdrive is a MUST, no 3speeds. 4L80e if you can, 4L60e if you must.
Built a 7.4L with a (built)700r4 in mine, wouldn’t spend my money that way again.
 

WFO

Full Access Member
Joined
Jan 6, 2017
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3,688
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5,035
Location
Texas Panhandle
First Name
Dan
Truck Year
1986
Truck Model
K20
Engine Size
350
Welcome from the Texas Panhandle.
 

HOTFOOT

Full Access Member
Joined
Feb 29, 2020
Posts
474
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1,041
Location
northwest ct
First Name
michael
Truck Year
1980
Truck Model
gmc k3500 srw
Engine Size
400
welcome from ct.
 

Shorty81

Baby Boomer
Joined
Mar 19, 2018
Posts
3,102
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5,778
Location
North West ohio
First Name
Darren
Truck Year
86
Truck Model
K20
Engine Size
496
Welcome from the Buckeye State. I'd keep the 292.
 

86 SCOTTSDALE

Full Access Member
Joined
Apr 10, 2019
Posts
360
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281
Location
Oakham MA
First Name
Armand
Truck Year
1986
Truck Model
K10
Engine Size
305
Welcome from New England
 

Termite_Delight

Full Access Member
Joined
Feb 17, 2018
Posts
675
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1,257
Location
Lanark Ontario Canada
First Name
Andy
Truck Year
1976 1975
Truck Model
K2500 K2500
Engine Size
350 L33
Welcome from the Ottawa Valley! That's a great name you got there. :cheers:
 

GXPWeasel

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Joined
Nov 5, 2019
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589
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Location
Kansas
First Name
Greg
Truck Year
1982 | 2015
Truck Model
Sierra C15 | Silverado Z71
Engine Size
5.0 | 5.3
Welcome, from KS.
 

Craig 85

Full Access Member
Joined
Jan 25, 2017
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3,917
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Location
Nashville, TN
First Name
Craig
Truck Year
1985
Truck Model
K30 SRW
Engine Size
454/TH-400/NP205
Welcome. I'd probably do the LS swap since you're in California. Even though the '77 3/4 ton would have minimal emissions, legally you'd probably still have to run a smog pump and a few other things. The '77 K5 I had in the early 90's had a 400 with HD emissions and had a pump.
 

animal

Super Moderator
Staff member
Super Moderator
Joined
Jul 30, 2010
Posts
5,603
Reaction score
3,849
Location
Georgia
First Name
Lee
Truck Year
1986
Truck Model
c10 silverado
Engine Size
350ish
:welcome:
 

82sbshortbed

Fuckemall!!
Joined
Mar 1, 2018
Posts
15,828
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53,159
Location
SE Texas
First Name
Doug
Truck Year
1982, 1984
Truck Model
1500 shortbed, 1500 longbed
Engine Size
454, 305
Welcome from Texas

Got any pics of the ol girl?
 

RoryH19

Full Access Member
Joined
Aug 21, 2015
Posts
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1,082
Location
Texas
First Name
Rory
Truck Year
1987
Truck Model
R10 Silverado SWB
Engine Size
350 TBI
Welcome from TX
 

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