Does it have a coil already?

The coil is in the cap, you can see it in the picture, It is as pictured! At least mine was, red cap red wires, complete HeI distributor

Will this fit a 1977 C20 with a 454?

Yes and you will be happy with performance i sure was great product

Will this fit a 1986 gmc sierra 7.4 454 motor?

Yes. I put this on my 1985 454cid.

Will it work on a 74 c10 with a 454?

Yes it will . It will fit any small block or big block Chevrolet motor except for tall deck 427 and tall deck 366 and tall deck 454.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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HEI Distributor with Spark Plug Wires Replacement for Chevy SBC 350 BBC 454 | Ignition Combo Kit, 10.5mm, Silicone

Product ID: 97893239

Details

Brand
JDMSPEED
Connector Type
Spade
Item Weight
4.15 Kilograms
Material
Silicone
Wire Diameter
10.5

⚡10.5mm high-performance spark plug wires

🔥Compatible with SBC & BBC engines up to 454

🔧Direct replacement for GM 4-pin ignition modules

R3942

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Ignite your Chevy’s soul with race-grade precision!

SLEEK RED CAP DESIGN - Stand out under the hood with a bold red distributor cap that screams performance.
PLUG PLAY PRECISION - Seamlessly replaces GM 4-pin ignition modules—no hassle, just instant upgrade.
DURABLE SILICONE BUILD - Premium silicone cables ensure longevity and resilience under extreme conditions.
RACE READY IGNITION POWER - 10.5mm silicone wires deliver superior conductivity and heat resistance for peak engine performance.
UNIVERSAL CHEVY COMPATIBILITY - Fits small and big block Chevy engines from 283 to 454, covering your classic muscle needs.

The JDMSPEED HEI Distributor with Spark Plug Wires Combo Kit is a high-performance ignition upgrade designed for Chevy small and big block engines (283-454). Featuring 10.5mm silicone spark plug wires and a direct-fit distributor with a red cap, it ensures reliable, heat-resistant ignition and easy installation for GM 4-pin ignition systems.

Specifications

ASIN	B07L2WHMCQ
Best Sellers Rank	#69,396 in Automotive ( See Top 100 in Automotive ) #16 in Automotive Replacement Distributors
Brand Name	JDMSPEED
Cable Type	sbc
Connector Type	Spade Connector
Customer Reviews	4.6 4.6 out of 5 stars (478)
Item Weight	4.15 Kilograms
Manufacturer	JDMSPEED
Material Type	Silicone
Model	Plug wires SBC BBC 350 383 400
Part Interchange Info	Distributor With Plug wires SBC BBC 350 383 400
Part Number	Plug wires SBC BBC 350 383 400
UPC	686494009905
Wire Diameter	10.5 Millimeters

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