Timing help please

[jbone]

I posted this in GEAR HEADS, but everyone is asleep.
I am trying to check/set timing on my 502 carburated. I think I'm supposed to jump a connection somewhere, but not sure exactly where.
There is an empty electrical inlet on the dist. is this where I jump it?
I think the manufacturer says 10 deg before tdc. Is this what I should stick with??
Any help would be appreciated.
J

[ColeTR2]

Most timing lights have three wires a positive and native that go on the battery. Then the third just lightly clamps on the number one spark plug wire. On a big block Chevy the number one wire looking at the front of the motor is on your right front. And I would keep it at 10 degrees. There is a bolt at the base of the distributor that holds a clam loosen it just enough too barely rotate the distributor. Make a mark with a black pen from the base of distributor to the intake manifold so you know where you started. And only turn distributor a hair. Have you turned the distributor? Why are you timing it? You really should have someone that knows what they doing help you with this.

[Jordy]

Wouldn't #1 be the front left as you're in the seat or standing behind it, in a jet or I/O with the engine facing foward???

[ColeTR2]

http://www2.***boat.com/image_center/data/504/738502a.jpg
When your looking at the front of the motor timing it. Number one cylinder is on your front right side.
http://www2.***boat.com/image_center/data/504/738502b.jpg

[Jordy]

Number 1 would be the front left on an I/O, jet, or v-drive running off the balancer or the right rear on a v-drive running off the flywheel. ;)

[C-2]

If it's a Thunderbolt V ignition (probably is since a 502 carb?) then you have to ground the purple wire from the distributor???