Buick dizzys are only direct replacements in engines equipped with Buick oil
pumps ( at least the gears & shaft) which usually means a Buick front cover.
Buick dizzys can be modified to work on your Rover, & Mallory units are
available as modified Buick items. The difference is the oil pump drive
shaft. One is slotted, the other is a tongue, & the length may be different
also.
Wedge shop- Woody Cooper- is my source for Mallory stuff SCMTR8@aol.com,
508 880 5448. D & D may also modify dizzya to fit Rovers, I never asked Dan
about it 810 798 2491, but he certainly can supply the Buick stuff.
Jim Stuart
Larry Michelon wrote:
> The following is on a '89 Range Rover NAS fitted with a 3.9l V8. It was
> running like crap, so I replaced the plug wires. I found the timing to
> be at ~16 BTDC (previously set at 10). I took the top of the distributor
> apart. It seemed the advance weights were a little stiff, so I lubed and
> freed them up. But it still didn't seem like the springs were pulling
> them all the way back in. I reassembled the distributor with a new
> vacuum advance unit, top hat (the thing that keeps the shaft from rising
> up), cap and rotor. It ran fine.
>
> Until, it started running poorly again. Timing light shows the timing to
> be ~14 BTDC and frequently jumps (to no specific point). Driving the RR
> is OK up to 3000rpm. Above 3000rpm it runs GREAT, pulling very strongly.
>
> I was told I really couldn't replace the springs for the weights and
> that it would be time to replace the distributor anyhow. Reading in the
> archives I saw that this was recently discussed. I am considering a
> Mallory unit (can't find a supplier, but I need to try Summit) or an HEI
> from a 75-79 Buick 350. Is the Buick HEI a direct swap, except for the
> clearance problem of the hold down (fixable with a V6 hold down)?
>
> Larry Michelon
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