I’d turf the whole thing and get a distributor from a WB or VB to VK. You can buy the right HEI coil now from Goss that will fit as per original. Will just mean new leads as these dizzys have posts on them. Bigger plug gaps and bridge the ignition switch start and run terminals.

Just looked up in the HR March 1967 Handbook and its 161 ---019 to 025 , 186 & X2 017 to 024. This is the handbook I am bringing to the Holden Nationals for you .....looks like you need it.

It needs to be set to suit the engine. HQ have a lot smaller cam and engine characteristics to a HR-HG 186S or HT-HG 186. I'd still change the dizzy though.

Here is the HR 186S timing specs from the GMH Engineering Technical Specs

Edited by user Friday, 17 February 2023 5:49:32 AM(UTC)  | Reason: Not specified

Could it be that the HR specs are for the Lucas dissy, which was very common in HR ?

The other thing is that you are better off setting the points by dwell angle rather than by their gap. It's more meaningful especially if the dissy is worn.

Dr Terry

P.S. I agree WagonDan, nothing wrong with a points dissy on a stock original car, all of my oldies are like that.

Surprisingly, there is no difference in specs between the Lucas and Bosch distributors.





Thanks for your responses guys 👍👍👍

I think the issue here is with the model of the dissy.

From EH up to early HK, Holden used a Bosch unit fitted with GB504 points, the later cars' dissies used GB534 points.

It would appear that the profile of the cam (inside the dissy) was changed at this point.

The earlier dissy required a gap of 0.012" - 0.016" resulting in a dwell of 36 to 40 degrees.

The later points setting is specified at 0.019" - 0.025" with a dwell of 30 to 35 degrees.

I think if you stick to the specs of your model of dissy you can't go wrong.

Dr Terry

Edited by user Monday, 20 February 2023 2:22:55 PM(UTC)  | Reason: Not specified