Which distributor to use?

[Anonymous]

I need some facts about the dual advance distributors from the late '60s. I read somewhere that this distributor w/Pertronix would be an improvement over the Loadomatic without having to swap to a DSII. Is this correct?

What size drive does it use? Is this distributor a direct swap without having to change the oil pump and intermediate drive shaft?

 

[rbohm]

8) the dual advance with pertronix approximates the dsll. if you have the late 64 up dist then you can swap them. if not you are stuck with the load-o-matic or getting a dist from oz(like i did). even then you still need to swap either the oil pump gears or the oil pump as you need to use the 5/16" pump deriveshaft.

 

[Anonymous]

I would guess that I have the early distributor, but I'm not positive. How can I tell them difference?

Also, are there any specific year(s) that I should look for the dual advance distributor?

Let me make sure I have this straight:

Early dist. = 1/4" drive

late 64-up = 5/16" drive

Is this correct?

 

[addo]

Well, if you've a four-main block, it's the early one. Shaft size is slightly smaller. That's the best rule of thumb. To fit the Oz distributor in the early block, you also need a later oil pump. There's a small amount of fiddling required, but it's worth doing, if the D-II won't fit.

Regards, Adam.

 

[Anonymous]

Take a look at the post under "Duraspark vs. Pertronix". A '64 200 is more than likely the 7 main engine (5 freeze plugs). If so, the '68-'73 dual advance dizzy will drop right in. The Pertronix II is easier to install than a set of points. The DSII will need some help, and the required rewire will take some time.

All the best - Steve

 

[Anonymous]

The car originally had a '64 200 w/only 4 mains. During the rebuild, the mechanic used a '78 block, but put the old oil pump and Loadomatic back in there.

So, either way, it looks like I would have to change the oil pump and intermediate drive shaft to upgrade the distributor to the '68-73 or DSII.

If I do this, I'll probably go with the '68-73 w/Pertronix. I can do all the wiring (which doesn't look too hard) for the DSII, but I would like to avoid it if at all possible.