77 C-20

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UrMaineGirlDj

Junior Member
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Mar 30, 2024
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Location
Maine
First Name
Dj
Truck Year
1977
Truck Model
C-20
Engine Size
454
My newly acquired C-20 had a full frame off restoration in ‘97, paint and tubs in 2015, all new fuel systems including Holley carb, tanks and lines. I’ve just acquired a built 502 that will be going in this winter replacing the 454 that’s in it. Curious to hear from people who have one and thoughts on which parts I should be beefing up to handle it well.
 

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Grit dog

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Location
Auburn, Washington
First Name
Todd
Truck Year
1986, 1977
Truck Model
K20, C10
Engine Size
454, 350
Nice truck!
No reason the (presuming) healthy turbo 400 shouldn’t handle the motor. It’ll roast the tires before it breaks the trans.
Maybe if you’re actually drag racing it or similar where you have enough traction to launch hard you might want a built trans.
 

UrMaineGirlDj

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Maine
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Dj
Truck Year
1977
Truck Model
C-20
Engine Size
454
Nice truck!
No reason the (presuming) healthy turbo 400 shouldn’t handle the motor. It’ll roast the tires before it breaks the trans.
Maybe if you’re actually drag racing it or similar where you have enough traction to launch hard you might want a built trans.
Does off the traffic light count?
 

Grit dog

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Auburn, Washington
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Todd
Truck Year
1986, 1977
Truck Model
K20, C10
Engine Size
454, 350
Welcome from Ohio. Easy on the old girl, no need to break traction!! Nice truck.
Lol, that’s almost entirely the point of putting big big block in an old truck. It ain’t practical for towing, it ain’t practical for drag racing and you could haul anything the bed will carry with a little 6 banger….
Spinning wheels are much easier on the drivetrain that putting all the power to the ground, fwiw.
 

UrMaineGirlDj

Junior Member
Joined
Mar 30, 2024
Posts
3
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8
Location
Maine
First Name
Dj
Truck Year
1977
Truck Model
C-20
Engine Size
454
Lol, that’s almost entirely the point of putting big big block in an old truck. It ain’t practical for towing, it ain’t practical for drag racing and you could haul anything the bed will carry with a little 6 banger….
Spinning wheels are much easier on the drivetrain that putting all the power to the ground, fwiw.
Oh I’m not concerned with towing anything just trying not break anything whilst setting the tires on fire.
 

legopnuematic

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1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
Truck Model
Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
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225/6, 350 c.i., 350 c.i., 5.9l Cummins
Welcome from Missouri.
 

Mr Clean

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454 BBC, & 383 Stroker
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