1974 D jet with new 123 Distributor a couple of questions Options

[Billy Bumpsteer]

Completely standard 2.0 1974 car with D jet, I have just replaced the dizzy with 123 version 4RVIE, old dizzy was a 0231 174 005

Question 1, what is the best setting for the flip switch?

Question 2, old dizzy had 2 vacuum hoses on it (one from top of throttle butterfly, one from below), 123 dizzy has only 1 port, what do I do?

TIA

[914_teener]

Completely standard 2.0 1974 car with D jet, I have just replaced the dizzy with 123 version 4RVIE, old dizzy was a 0231 174 005

Question 1, what is the best setting for the flip switch?

Question 2, old dizzy had 2 vacuum hoses on it (one from top of throttle butterfly, one from below), 123 dizzy has only 1 port, what do I do?

TIA

In my opinion the 73 2.0 setting. Use the vaccum advance port on the dizzy to PORTED vaccum port on the TB if you have a port on the TB. If you don't try and find a 2 liter TB that does.

Forget the timing retard port...just plug it at the source.

Set the static timing and set the dizzy up per the instructions. Your'e done.


Edit:

To know which is ported vaccum and which is manifold vaccum...the ported vaccum for advance is on the atmosphere side of the TB plate.