Is there an automotive application that will fit a 1996 454 Mag? Does anyone know a part number of a vehicle application to look them up by? I keep doing the search and people mention there is options but never give a part number of a year, make model.

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Not sure this helps but I have semi hopped up gen v 454 mag I used mallory marine 8mm spiral core spark plug wires I believe they were about 60 bucks. I think I picked em up from summit they have plenty of marine wires. If looking for auto best bet to cross reference to say a 3500 pickup truck with the 7.4 in that year range.
I see you are also from cuse I just picked my boat up out of storage saturday wish I waited longer with all this rain in the forecast.

Save yourself the headache and buy marine wires. You will need the coil wire also. Brand new on Ebay $58

http://www.ebay.com/itm/OEM-MerCruis...d65680&vxp=mtr

^^^^ what he said. Interferance (EMI) from wires can play hell with your tach alone.

Ayuh,.... Spark plug wires cut, 'n built for automotive applications, Rarely to Never work on a boat motor,...
They're Too Short,....

Most to all automotive applications, the wires run up over the motor,...

Most Marine applications run down, 'round the aft, 'n up to the spark plugs,...

Yer pissin' in the wind, tryin' to save a nickle, when there ain't no nickle there,....