Thanks.

Quote:It is T-shaped. There is the head of the T, and the stem of the T. Marked 'c' & 's' on the black box.

The wiki has the wiring for it:
Head of T: Blue or White wire (coil negative)
Sstem of T: B/W wire (coil positive)

I know that a Kettering [points type] ignition requires a condenser, & 2.2 microfarads seems to be a common capacity, but I don't recall seeing one on an electronic ignition before.
I run a Pertronix kit in my 1200 distributor & a factory HEI system on the L20B in my 200B & neither of these use a condenser if that's any guide.

Quote:

if you put them on the wrong way you won't get any spark... so just try if there are no markings.

i've been running a JTS high energy coil with elec dizzy for some time now and at no stage have i run a condenser on the coil. i have one on the alternator i believe

They are measured in uf (micro farad). A condensor from the old 280z should work fine the values on most of them are pretty close if not the same. You could also buy one new from your local auto parts store. They are normally in stock for most vehicles.

About the only datsuns you find left up here are the old 280z and 300z.

Now how do you tell which terminal is which on the distributor??

I don't know how condensors are measured. You could just go to wreckers and get one from a 1978-1983 type Datsun (any kind). Oh, probably not any in Maine though. Maybe one from any other car.

Well from the wiring diagram it appears you may not need one. They show one for the alternator, but not one for the distributor.

Thanks makes more sense now

I'm in Maine

What size condenser by the way??

Exactly right:

1. The two wires on the distributor go to + and - terminals of the coil
2. remove the old coil, replace with 12V coil
3. bypass the ballast resistor.
4. Add a (required) condensor on the hot side
5. Add an (optional) tachometer to the negative side. NOTE: Factory tachos don't use this line

More pics and explanation here: club wiki - B310 Electronic Distributor Swap

McD, which state are you in?

Yes the coil grounds threw the dizzy. The part in the diagram that you are seeing with the + going to ground is the condensor wired in. The condensor connects to the hot lead on one side and ground on the other.