Spark Plug Wire Length V8

Fig 1: Identifying Melco® & Delphi® Spark Plug Wires

Courtesy of GENERAL MOTORS CORP.

The Melco® (square design) uses a spark plug wire (1) that is 145 mm (5.70 in) length cable seal to cable seal.
The Delphi® (round design) uses a spark plug wire (2) that is 110 mm (4.30 in) length cable seal to cable seal.

Fig 2: Identifying Melco® & Delphi® Ignition Coils

Courtesy of GENERAL MOTORS CORP.

There are 2 different manufacturers for the ignition coils. the Melco® (1) (square design), and the Delphi® (2) (round design). These 2 coils use 2 different spark plug wire, and mounting brackets.

Fig 3: Identifying Coil Mounting Brackets

Courtesy of GENERAL MOTORS CORP.