ChasD

Every time I see a post with the pics for running plug wires, it's the same SBC picture, which shows a carb. It clearly states to run plug wires for cylinders 2 and 3 in front of distributor. I see plenty of room behind the distributor and very little in front because of the plenum with the TPI. I cannot think of any reason not to run behind, but just wanted to double-check. I have purchased a car that has spaghetti wiring for the plugs and the rotor was 180* out from the correct position for TDC on #1 cylinder. Just trying to get it right and going with MSD universal wires that come with a nice crimping tool. I wanted to make them look nice and am not running behind valve covers. Just up and over and as neat as I can get them. Thanks for your help.

John A. Marker

With my 85, there is no choice but to run some of the wires behind the distributor against the firewall. Have done this for years now without and problems.

stoydido

probably will work fine. but...the fsm says that the high energy in plug wires can cause misreads interference whatever with the est wire and other ecm wiring, esp on the main plug to distributor.

Keystring

Ran all the plug wires behind the distributor, and engine, on my 85 TPI trans am.

Ran great with no problems.

pmihaltian

Here is the correct plug wire routing for your L98 Corvette engine:

Joe C

here's a pic of a NOS L98 (1990 vintage) crate motor showing some of the spark plug wiring running behind the distributor...

383vett

I run #3 and #6 wires behind the distributor on my car.

GREGGPENN

I agree, you can do it. The factory did it. Also notice the way wires are secured on the backside of the dizzy. If you take steps to make sure distributor wires and other electronics don't come in contact, correct operation will have a much better chance of success.




Edit: The other thing to consider is interaction of the wires themselves. Ideally, you don't want to criss-cross the wires, you want them parallel. You also want some space between wires, which is why they use looms as shown in the pic above.

coupeguy2001

Just try to get that rocker cover off while it's in the car..........pretty engine though.

Cliff Harris

If you look closely at the second pic you'll see a CARBURETOR!!! The FSM was a little behind in their documentation (and they borrowed pictures from other vehicles).

On my car there is physically not enough room to route the plug wires between the distributor cap and the rear of the plenum. They've been behind the distributor for 25 years and have worked just fine back there.

rodj

Every stock virgin C4 I have worked on has them behind cap